Abstract

Achieving high-Q-factor resonances allows dramatic enhancement of performance of many plasmonic devices. However, the excitation of high-Q-factor resonance, especially multiple high-Q-factor resonances, has been a big challenge in traditional metamaterials due to the ohmic and radiation losses. Here, we experimentally demonstrate simultaneous excitation of double extremely sharp resonances in a terahertz metamaterial composed of mirror-symmetric-broken double split ring resonators (MBDSRRs). In a regular mirror-arranged SRR array, only the low-Q-factor dipole resonance can be excited with the external electric field perpendicular to the SRR gap. Breaking the mirror-symmetry of the metamaterial leads to the occurrence of two distinct otherwise inaccessible ultrahigh-Q-factor modes, which consists of one trapped mode in addition to an octupolar mode. By tuning the asymmetry parameter, the Q factor of the trapped mode can be linearly modulated, while the Q factor of the octupolar mode can be tailored exponentially. For specific degree of asymmetry, our simulations revealed a significantly high Q factor (Q>100) for the octupolar mode, which is more than one order of magnitude larger than that of conventional metamaterials. The mirror-symmetry-broken metamaterial offers the advantage of enabling access to two distinct high-Q-factor resonances which could be exploited for ultrasensitive sensors, multiband filters, and slow light devices.

© 2017 Optical Society of America

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References

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2017 (4)

M. Gupta, Y. K. Srivastava, M. Manjappa, and R. Singh, “Sensing with toroidal metamaterial,” Appl. Phys. Lett. 110(12), 121108 (2017).
[Crossref]

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
[Crossref] [PubMed]

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “High-Q plasmonic Fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing,” Adv. Opt. Mater. 5(2), 1600559 (2017).
[Crossref]

2016 (14)

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

H. Zhang, C. Li, C. Zhang, X. Zhang, J. Gu, B. Jin, J. Han, and W. Zhang, “Experimental study on the transition of plasmonic resonance modes in double-ring dimers by conductive junctions in the terahertz regime,” Opt. Express 24(24), 27415–27422 (2016).
[Crossref] [PubMed]

N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
[Crossref] [PubMed]

M. Gupta and R. Singh, “Toroidal versus Fano resonances in high Q planar THz metamaterials,” Adv. Opt. Mater. 4(12), 2119–2125 (2016).
[Crossref]

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Y. Moritake, Y. Kanamori, and K. Hane, “Demonstration of sharp multiple Fano resonances in optical metamaterials,” Opt. Express 24(9), 9332–9339 (2016).
[Crossref] [PubMed]

Y. K. Srivastava, M. Manjappa, H. N. S. Krishnamoorthy, and R. Singh, “Accessing the high-Q dark plasmonic Fano resonances in superconductor metasurfaces,” Adv. Opt. Mater. 4(11), 1875–1881 (2016).
[Crossref]

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “Independent tailoring of super-radiant and sub-radiant modes in high-Q plasmonic Fano resonant metasurfaces,” Adv. Opt. Mater. 4(11), 1860–1866 (2016).
[Crossref]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

M. Manjappa, Y. K. Srivastava, and R. Singh, “Lattice-induced transparency in planar metamaterials,” Phys. Rev. B 94, 161103 (2016).

M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

2015 (7)

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

S. N. Burokur, A. Lupu, and A. Lustrac, “Direct dark mode excitation by symmetry matching of a single-particle-based metasurface,” Phys. Rev. B 91(3), 035104 (2015).
[Crossref]

I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

W. Liu, S. Chen, Z. Li, H. Cheng, P. Yu, J. Li, and J. Tian, “Realization of broadband cross-polarization conversion in transmission mode in the terahertz region using a single-layer metasurface,” Opt. Lett. 40(13), 3185–3188 (2015).
[Crossref] [PubMed]

2014 (6)

D. R. Chowdhury, X. Su, Y. Zeng, X. Chen, A. J. Taylor, and A. Azad, “Excitation of dark plasmonic modes in symmetry broken terahertz metamaterials,” Opt. Express 22(16), 19401–19410 (2014).
[Crossref] [PubMed]

N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
[Crossref]

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

Y. Yang, I. I. Kravchenko, D. P. Briggs, and J. Valentine, “All-dielectric metasurface analogue of electromagnetically induced transparency,” Nat. Commun. 5, 5753 (2014).
[Crossref] [PubMed]

G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
[Crossref]

2013 (2)

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

Y. Fan, Z. Wei, H. Li, H. Chen, and C. Soukoulis, “Low-loss and high-Q planar metamaterial with toroidal moment,” Phys. Rev. B 87(11), 115417 (2013).
[Crossref]

2012 (4)

J. H. Shi, H. F. Ma, W. X. Jiang, and T. J. Cui, “Multiband stereometamaterial-based polarization spectral filter,” Phys. Rev. B 86(3), 035103 (2012).
[Crossref]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

W. Cao, R. Singh, I. A. Al-Naib, M. He, A. J. Taylor, and W. Zhang, “Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials,” Opt. Lett. 37(16), 3366–3368 (2012).
[Crossref] [PubMed]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

2011 (3)

R. Singh, I. A. Al-Naib, M. Koch, and W. Zhang, “Sharp Fano resonances in THz metamaterials,” Opt. Express 19(7), 6312–6319 (2011).
[Crossref] [PubMed]

C. Jansen, I. Al-Naib, N. Born, and M. Koch, “Terahertz metasurfaces with high Q-factors,” Appl. Phys. Lett. 98(5), 051109 (2011).
[Crossref]

N. I. Zheludev, E. Plum, and V. A. Fedotov, “Metamaterial polarization spectral filter: isolated transmission line at any prescribed wavelength,” Appl. Phys. Lett. 99(17), 171915 (2011).
[Crossref]

2009 (4)

K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
[Crossref] [PubMed]

A. Bitzer, J. Wallauer, H. Helm, H. Merbold, T. Feurer, and M. Walther, “Highly selective terahertz bandpass filters based on trapped mode excitation,” Opt. Express 17, 22108–22113 (2009).
[Crossref] [PubMed]

D. Ö. Güney, T. Koschny, and C. M. Soukoulis, “Reducing ohmic losses in metamaterials by geometric tailoring,” Phys. Rev. B 80(12), 125129 (2009).
[Crossref]

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
[Crossref]

2008 (2)

S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
[Crossref] [PubMed]

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
[Crossref] [PubMed]

2007 (1)

V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
[Crossref] [PubMed]

2006 (1)

D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

2001 (1)

R. A. Shelby, D. R. Smith, and S. Schultz, “Experimental verification of a negative index of refraction,” Science 292(5514), 77–79 (2001).
[Crossref] [PubMed]

Alapan, Y.

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

Al-Naib, I.

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
[Crossref] [PubMed]

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
[Crossref]

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

C. Jansen, I. Al-Naib, N. Born, and M. Koch, “Terahertz metasurfaces with high Q-factors,” Appl. Phys. Lett. 98(5), 051109 (2011).
[Crossref]

Al-Naib, I. A.

Azad, A.

Azad, A. K.

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Bartal, G.

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
[Crossref] [PubMed]

Bitzer, A.

Born, N.

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
[Crossref]

C. Jansen, I. Al-Naib, N. Born, and M. Koch, “Terahertz metasurfaces with high Q-factors,” Appl. Phys. Lett. 98(5), 051109 (2011).
[Crossref]

Briggs, D. P.

Y. Yang, I. I. Kravchenko, D. P. Briggs, and J. Valentine, “All-dielectric metasurface analogue of electromagnetically induced transparency,” Nat. Commun. 5, 5753 (2014).
[Crossref] [PubMed]

Brueck, S. R. J.

K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
[Crossref] [PubMed]

Burokur, S. N.

S. N. Burokur, A. Lupu, and A. Lustrac, “Direct dark mode excitation by symmetry matching of a single-particle-based metasurface,” Phys. Rev. B 91(3), 035104 (2015).
[Crossref]

Cao, J. X.

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
[Crossref]

Cao, W.

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

W. Cao, R. Singh, I. A. Al-Naib, M. He, A. J. Taylor, and W. Zhang, “Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials,” Opt. Lett. 37(16), 3366–3368 (2012).
[Crossref] [PubMed]

Capasso, F.

M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

Chaker, M.

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

Chen, H.

Y. Fan, Z. Wei, H. Li, H. Chen, and C. Soukoulis, “Low-loss and high-Q planar metamaterial with toroidal moment,” Phys. Rev. B 87(11), 115417 (2013).
[Crossref]

Chen, H.-T.

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Chen, J.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Chen, S.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

W. Liu, S. Chen, Z. Li, H. Cheng, P. Yu, J. Li, and J. Tian, “Realization of broadband cross-polarization conversion in transmission mode in the terahertz region using a single-layer metasurface,” Opt. Lett. 40(13), 3185–3188 (2015).
[Crossref] [PubMed]

Chen, W. T.

M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

Chen, X.

Cheng, H.

Chin, X. Y.

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “High-Q plasmonic Fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing,” Adv. Opt. Mater. 5(2), 1600559 (2017).
[Crossref]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “Independent tailoring of super-radiant and sub-radiant modes in high-Q plasmonic Fano resonant metasurfaces,” Adv. Opt. Mater. 4(11), 1860–1866 (2016).
[Crossref]

Chowdhury, D. R.

D. R. Chowdhury, X. Su, Y. Zeng, X. Chen, A. J. Taylor, and A. Azad, “Excitation of dark plasmonic modes in symmetry broken terahertz metamaterials,” Opt. Express 22(16), 19401–19410 (2014).
[Crossref] [PubMed]

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

Christodoulides, D.

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

Cibella, S.

G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
[Crossref]

Cong, L.

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
[Crossref] [PubMed]

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

Cui, A.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Cui, L.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

Cui, T. J.

J. H. Shi, H. F. Ma, W. X. Jiang, and T. J. Cui, “Multiband stereometamaterial-based polarization spectral filter,” Phys. Rev. B 86(3), 035103 (2012).
[Crossref]

Cummer, S. A.

D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

Dalvit, D. A. R.

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

Dani, K. M.

K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
[Crossref] [PubMed]

Dayal, G.

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “High-Q plasmonic Fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing,” Adv. Opt. Mater. 5(2), 1600559 (2017).
[Crossref]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “Independent tailoring of super-radiant and sub-radiant modes in high-Q plasmonic Fano resonant metasurfaces,” Adv. Opt. Mater. 4(11), 1860–1866 (2016).
[Crossref]

De Luca, A.

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

Delprat, S.

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

Devlin, R. C.

M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

Dignam, M. M.

I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

Ding, L.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Dong, Z. G.

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
[Crossref]

Du, S.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

e, Y.

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

ElKabbash, M.

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

Faist, J.

G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
[Crossref]

Fan, Y.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

Y. Fan, Z. Wei, H. Li, H. Chen, and C. Soukoulis, “Low-loss and high-Q planar metamaterial with toroidal moment,” Phys. Rev. B 87(11), 115417 (2013).
[Crossref]

Fedotov, V. A.

N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
[Crossref] [PubMed]

N. I. Zheludev, E. Plum, and V. A. Fedotov, “Metamaterial polarization spectral filter: isolated transmission line at any prescribed wavelength,” Appl. Phys. Lett. 99(17), 171915 (2011).
[Crossref]

V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
[Crossref] [PubMed]

Feurer, T.

Genov, D. A.

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
[Crossref] [PubMed]

S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
[Crossref] [PubMed]

Gholipour, B.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

Giessen, H.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

Gong, Z.

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Grady, N. K.

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

Gu, C.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Gu, J.

Güney, D. Ö.

D. Ö. Güney, T. Koschny, and C. M. Soukoulis, “Reducing ohmic losses in metamaterials by geometric tailoring,” Phys. Rev. B 80(12), 125129 (2009).
[Crossref]

Gupta, M.

M. Gupta, Y. K. Srivastava, M. Manjappa, and R. Singh, “Sensing with toroidal metamaterial,” Appl. Phys. Lett. 110(12), 121108 (2017).
[Crossref]

M. Gupta and R. Singh, “Toroidal versus Fano resonances in high Q planar THz metamaterials,” Adv. Opt. Mater. 4(12), 2119–2125 (2016).
[Crossref]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

Gurkan, U. A.

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

Han, J.

Hane, K.

He, M.

Hebestreit, E.

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

Helm, H.

Heyes, J. E.

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
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K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
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Hou, Y.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Hu, W.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
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Ilker, E.

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
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Jansen, C.

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
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N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
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C. Jansen, I. Al-Naib, N. Born, and M. Koch, “Terahertz metasurfaces with high Q-factors,” Appl. Phys. Lett. 98(5), 051109 (2011).
[Crossref]

Jiang, L.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Jiang, W. X.

J. H. Shi, H. F. Ma, W. X. Jiang, and T. J. Cui, “Multiband stereometamaterial-based polarization spectral filter,” Phys. Rev. B 86(3), 035103 (2012).
[Crossref]

Jin, B.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

H. Zhang, C. Li, C. Zhang, X. Zhang, J. Gu, B. Jin, J. Han, and W. Zhang, “Experimental study on the transition of plasmonic resonance modes in double-ring dimers by conductive junctions in the terahertz regime,” Opt. Express 24(24), 27415–27422 (2016).
[Crossref] [PubMed]

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D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

Kanamori, Y.

Kang, L.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

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M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

Koch, M.

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
[Crossref]

C. Jansen, I. Al-Naib, N. Born, and M. Koch, “Terahertz metasurfaces with high Q-factors,” Appl. Phys. Lett. 98(5), 051109 (2011).
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R. Singh, I. A. Al-Naib, M. Koch, and W. Zhang, “Sharp Fano resonances in THz metamaterials,” Opt. Express 19(7), 6312–6319 (2011).
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D. Ö. Güney, T. Koschny, and C. M. Soukoulis, “Reducing ohmic losses in metamaterials by geometric tailoring,” Phys. Rev. B 80(12), 125129 (2009).
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Y. Yang, I. I. Kravchenko, D. P. Briggs, and J. Valentine, “All-dielectric metasurface analogue of electromagnetically induced transparency,” Nat. Commun. 5, 5753 (2014).
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Krishnamoorthy, H. N. S.

Y. K. Srivastava, M. Manjappa, H. N. S. Krishnamoorthy, and R. Singh, “Accessing the high-Q dark plasmonic Fano resonances in superconductor metasurfaces,” Adv. Opt. Mater. 4(11), 1875–1881 (2016).
[Crossref]

Ku, Z.

K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
[Crossref] [PubMed]

Lederer, F.

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

Leoni, R.

G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
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Li, C.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

H. Zhang, C. Li, C. Zhang, X. Zhang, J. Gu, B. Jin, J. Han, and W. Zhang, “Experimental study on the transition of plasmonic resonance modes in double-ring dimers by conductive junctions in the terahertz regime,” Opt. Express 24(24), 27415–27422 (2016).
[Crossref] [PubMed]

Li, H.

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
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Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
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S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
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A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
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W. Liu, S. Chen, Z. Li, H. Cheng, P. Yu, J. Li, and J. Tian, “Realization of broadband cross-polarization conversion in transmission mode in the terahertz region using a single-layer metasurface,” Opt. Lett. 40(13), 3185–3188 (2015).
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Li, T.

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
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T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
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Li, W.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Li, Z.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

W. Liu, S. Chen, Z. Li, H. Cheng, P. Yu, J. Li, and J. Tian, “Realization of broadband cross-polarization conversion in transmission mode in the terahertz region using a single-layer metasurface,” Opt. Lett. 40(13), 3185–3188 (2015).
[Crossref] [PubMed]

Liang, L.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Liu, H.

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
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S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
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C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

W. Liu, S. Chen, Z. Li, H. Cheng, P. Yu, J. Li, and J. Tian, “Realization of broadband cross-polarization conversion in transmission mode in the terahertz region using a single-layer metasurface,” Opt. Lett. 40(13), 3185–3188 (2015).
[Crossref] [PubMed]

Liu, Z.

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
[Crossref] [PubMed]

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Lu, Y.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
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S. N. Burokur, A. Lupu, and A. Lustrac, “Direct dark mode excitation by symmetry matching of a single-particle-based metasurface,” Phys. Rev. B 91(3), 035104 (2015).
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Lustrac, A.

S. N. Burokur, A. Lupu, and A. Lustrac, “Direct dark mode excitation by symmetry matching of a single-particle-based metasurface,” Phys. Rev. B 91(3), 035104 (2015).
[Crossref]

Ma, H. F.

J. H. Shi, H. F. Ma, W. X. Jiang, and T. J. Cui, “Multiband stereometamaterial-based polarization spectral filter,” Phys. Rev. B 86(3), 035103 (2012).
[Crossref]

Maissen, C.

G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
[Crossref]

Manjappa, M.

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
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M. Gupta, Y. K. Srivastava, M. Manjappa, and R. Singh, “Sensing with toroidal metamaterial,” Appl. Phys. Lett. 110(12), 121108 (2017).
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M. Manjappa, Y. K. Srivastava, and R. Singh, “Lattice-induced transparency in planar metamaterials,” Phys. Rev. B 94, 161103 (2016).

Y. K. Srivastava, M. Manjappa, H. N. S. Krishnamoorthy, and R. Singh, “Accessing the high-Q dark plasmonic Fano resonances in superconductor metasurfaces,” Adv. Opt. Mater. 4(11), 1875–1881 (2016).
[Crossref]

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
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L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
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Merbold, H.

Michel, A.-K. U.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

Mock, J. J.

D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

Moloney, J. V.

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

Morandotti, R.

N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
[Crossref]

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

Moritake, Y.

Nam, S.

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Neubrech, F.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

Oh, J.

M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

Ozaki, T.

N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
[Crossref]

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

Papasimakis, N.

N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
[Crossref] [PubMed]

V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
[Crossref] [PubMed]

Park, Y.-S.

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Pendry, J. B.

D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

Plum, E.

N. I. Zheludev, E. Plum, and V. A. Fedotov, “Metamaterial polarization spectral filter: isolated transmission line at any prescribed wavelength,” Appl. Phys. Lett. 99(17), 171915 (2011).
[Crossref]

Prasankumar, R. P.

K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
[Crossref] [PubMed]

Prosvirnin, S. L.

V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
[Crossref] [PubMed]

Raybould, T. A.

N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
[Crossref] [PubMed]

Reiten, M. T.

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

Rho, J.

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Rocheleau, D.

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

Rockstuhl, C.

I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
[Crossref] [PubMed]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
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V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
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N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
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M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
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G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
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A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
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N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
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R. A. Shelby, D. R. Smith, and S. Schultz, “Experimental verification of a negative index of refraction,” Science 292(5514), 77–79 (2001).
[Crossref] [PubMed]

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D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
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Shelby, R. A.

R. A. Shelby, D. R. Smith, and S. Schultz, “Experimental verification of a negative index of refraction,” Science 292(5514), 77–79 (2001).
[Crossref] [PubMed]

Shen, T. H.

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
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J. H. Shi, H. F. Ma, W. X. Jiang, and T. J. Cui, “Multiband stereometamaterial-based polarization spectral filter,” Phys. Rev. B 86(3), 035103 (2012).
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M. Gupta, Y. K. Srivastava, M. Manjappa, and R. Singh, “Sensing with toroidal metamaterial,” Appl. Phys. Lett. 110(12), 121108 (2017).
[Crossref]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “High-Q plasmonic Fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing,” Adv. Opt. Mater. 5(2), 1600559 (2017).
[Crossref]

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
[Crossref] [PubMed]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “Independent tailoring of super-radiant and sub-radiant modes in high-Q plasmonic Fano resonant metasurfaces,” Adv. Opt. Mater. 4(11), 1860–1866 (2016).
[Crossref]

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

Y. K. Srivastava, M. Manjappa, H. N. S. Krishnamoorthy, and R. Singh, “Accessing the high-Q dark plasmonic Fano resonances in superconductor metasurfaces,” Adv. Opt. Mater. 4(11), 1875–1881 (2016).
[Crossref]

M. Manjappa, Y. K. Srivastava, and R. Singh, “Lattice-induced transparency in planar metamaterials,” Phys. Rev. B 94, 161103 (2016).

M. Gupta and R. Singh, “Toroidal versus Fano resonances in high Q planar THz metamaterials,” Adv. Opt. Mater. 4(12), 2119–2125 (2016).
[Crossref]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

W. Cao, R. Singh, I. A. Al-Naib, M. He, A. J. Taylor, and W. Zhang, “Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials,” Opt. Lett. 37(16), 3366–3368 (2012).
[Crossref] [PubMed]

R. Singh, I. A. Al-Naib, M. Koch, and W. Zhang, “Sharp Fano resonances in THz metamaterials,” Opt. Express 19(7), 6312–6319 (2011).
[Crossref] [PubMed]

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D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

R. A. Shelby, D. R. Smith, and S. Schultz, “Experimental verification of a negative index of refraction,” Science 292(5514), 77–79 (2001).
[Crossref] [PubMed]

Soci, C.

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “High-Q plasmonic Fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing,” Adv. Opt. Mater. 5(2), 1600559 (2017).
[Crossref]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “Independent tailoring of super-radiant and sub-radiant modes in high-Q plasmonic Fano resonant metasurfaces,” Adv. Opt. Mater. 4(11), 1860–1866 (2016).
[Crossref]

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Y. Fan, Z. Wei, H. Li, H. Chen, and C. Soukoulis, “Low-loss and high-Q planar metamaterial with toroidal moment,” Phys. Rev. B 87(11), 115417 (2013).
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D. Ö. Güney, T. Koschny, and C. M. Soukoulis, “Reducing ohmic losses in metamaterials by geometric tailoring,” Phys. Rev. B 80(12), 125129 (2009).
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K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

Srivastava, Y. K.

M. Gupta, Y. K. Srivastava, M. Manjappa, and R. Singh, “Sensing with toroidal metamaterial,” Appl. Phys. Lett. 110(12), 121108 (2017).
[Crossref]

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
[Crossref] [PubMed]

M. Manjappa, Y. K. Srivastava, and R. Singh, “Lattice-induced transparency in planar metamaterials,” Phys. Rev. B 94, 161103 (2016).

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

Y. K. Srivastava, M. Manjappa, H. N. S. Krishnamoorthy, and R. Singh, “Accessing the high-Q dark plasmonic Fano resonances in superconductor metasurfaces,” Adv. Opt. Mater. 4(11), 1875–1881 (2016).
[Crossref]

Starr, A. F.

D. Schurig, J. J. Mock, B. J. Justice, S. A. Cummer, J. B. Pendry, A. F. Starr, and D. R. Smith, “Metamaterial electromagnetic cloak at microwave frequencies,” Science 314(5801), 977–980 (2006).
[Crossref] [PubMed]

Strangi, G.

K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
[Crossref] [PubMed]

Su, X.

Tang, C.

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

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A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

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D. R. Chowdhury, X. Su, Y. Zeng, X. Chen, A. J. Taylor, and A. Azad, “Excitation of dark plasmonic modes in symmetry broken terahertz metamaterials,” Opt. Express 22(16), 19401–19410 (2014).
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N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

W. Cao, R. Singh, I. A. Al-Naib, M. He, A. J. Taylor, and W. Zhang, “Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials,” Opt. Lett. 37(16), 3366–3368 (2012).
[Crossref] [PubMed]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
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K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
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Tittl, A.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
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J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
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K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
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Y. Yang, I. I. Kravchenko, D. P. Briggs, and J. Valentine, “All-dielectric metasurface analogue of electromagnetically induced transparency,” Nat. Commun. 5, 5753 (2014).
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J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
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Wallauer, J.

Walther, M.

Wang, B.

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Wang, L.

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

Wang, S.

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

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T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
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S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
[Crossref] [PubMed]

Wei, Z.

Y. Fan, Z. Wei, H. Li, H. Chen, and C. Soukoulis, “Low-loss and high-Q planar metamaterial with toroidal moment,” Phys. Rev. B 87(11), 115417 (2013).
[Crossref]

Withayachumnankul, W.

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

Wu, P.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Wuttig, M.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

Xia, X.

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Xu, N.

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

Xu, W.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

Yang, H.

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
[Crossref]

Yang, S.

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
[Crossref]

Yang, Y.

I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

Y. Yang, I. I. Kravchenko, D. P. Briggs, and J. Valentine, “All-dielectric metasurface analogue of electromagnetically induced transparency,” Nat. Commun. 5, 5753 (2014).
[Crossref] [PubMed]

Yin, X.

A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
[Crossref] [PubMed]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Yiwen, E.

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
[Crossref] [PubMed]

Yu, P.

Zeng, Y.

D. R. Chowdhury, X. Su, Y. Zeng, X. Chen, A. J. Taylor, and A. Azad, “Excitation of dark plasmonic modes in symmetry broken terahertz metamaterials,” Opt. Express 22(16), 19401–19410 (2014).
[Crossref] [PubMed]

N. K. Grady, J. E. Heyes, D. R. Chowdhury, Y. Zeng, M. T. Reiten, A. K. Azad, A. J. Taylor, D. A. R. Dalvit, and H.-T. Chen, “Terahertz metamaterials for linear polarization conversion and anomalous refraction,” Science 340(6138), 1304–1307 (2013).
[Crossref] [PubMed]

Zentgraf, T.

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
[Crossref] [PubMed]

Zhang, C.

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
[Crossref]

H. Zhang, C. Li, C. Zhang, X. Zhang, J. Gu, B. Jin, J. Han, and W. Zhang, “Experimental study on the transition of plasmonic resonance modes in double-ring dimers by conductive junctions in the terahertz regime,” Opt. Express 24(24), 27415–27422 (2016).
[Crossref] [PubMed]

Zhang, H.

Zhang, S.

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
[Crossref] [PubMed]

S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
[Crossref] [PubMed]

Zhang, W.

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

H. Zhang, C. Li, C. Zhang, X. Zhang, J. Gu, B. Jin, J. Han, and W. Zhang, “Experimental study on the transition of plasmonic resonance modes in double-ring dimers by conductive junctions in the terahertz regime,” Opt. Express 24(24), 27415–27422 (2016).
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I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

W. Cao, R. Singh, I. A. Al-Naib, M. He, A. J. Taylor, and W. Zhang, “Low-loss ultra-high-Q dark mode plasmonic Fano metamaterials,” Opt. Lett. 37(16), 3366–3368 (2012).
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R. Singh, I. A. Al-Naib, M. Koch, and W. Zhang, “Sharp Fano resonances in THz metamaterials,” Opt. Express 19(7), 6312–6319 (2011).
[Crossref] [PubMed]

Zhang, X.

H. Zhang, C. Li, C. Zhang, X. Zhang, J. Gu, B. Jin, J. Han, and W. Zhang, “Experimental study on the transition of plasmonic resonance modes in double-ring dimers by conductive junctions in the terahertz regime,” Opt. Express 24(24), 27415–27422 (2016).
[Crossref] [PubMed]

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
[Crossref]

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
[Crossref] [PubMed]

S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
[Crossref] [PubMed]

Zheludev, N. I.

N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
[Crossref] [PubMed]

M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

N. I. Zheludev, E. Plum, and V. A. Fedotov, “Metamaterial polarization spectral filter: isolated transmission line at any prescribed wavelength,” Appl. Phys. Lett. 99(17), 171915 (2011).
[Crossref]

V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
[Crossref] [PubMed]

Zhou, J.

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
[Crossref] [PubMed]

Zhu, A. Y.

M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
[Crossref] [PubMed]

Zhu, S. N.

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
[Crossref]

Zhu, Z. H.

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
[Crossref]

Adv. Mater. (4)

M. Manjappa, Y. K. Srivastava, L. Cong, I. Al-Naib, and R. Singh, “Active photoswitching of sharp Fano resonances in THz metadevices,” Adv. Mater. 29(3), 1603355 (2017).
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M. Gupta, V. Savinov, N. Xu, L. Cong, G. Dayal, S. Wang, W. Zhang, N. I. Zheludev, and R. Singh, “Sharp toroidal resonances in planar terahertz metasurfaces,” Adv. Mater. 28(37), 8206–8211 (2016).
[Crossref] [PubMed]

Z. Liu, S. Du, A. Cui, Z. Li, Y. Fan, S. Chen, W. Li, J. Li, and C. Gu, “High-quality-factor mid-infrared toroidal excitation in folded 3D metamaterials,” Adv. Mater. 29(17), 1606298 (2017).
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A. Tittl, A.-K. U. Michel, M. Schäferling, X. Yin, B. Gholipour, L. Cui, M. Wuttig, T. Taubner, F. Neubrech, and H. Giessen, “A switchable mid-infrared plasmonic perfect absorber with multispectral thermal imaging capability,” Adv. Mater. 27(31), 4597–4603 (2015).
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Adv. Opt. Mater. (7)

M. Gupta and R. Singh, “Toroidal versus Fano resonances in high Q planar THz metamaterials,” Adv. Opt. Mater. 4(12), 2119–2125 (2016).
[Crossref]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “High-Q plasmonic Fano resonance for multiband surface-enhanced infrared absorption of molecular vibrational sensing,” Adv. Opt. Mater. 5(2), 1600559 (2017).
[Crossref]

G. Dayal, X. Y. Chin, C. Soci, and R. Singh, “Independent tailoring of super-radiant and sub-radiant modes in high-Q plasmonic Fano resonant metasurfaces,” Adv. Opt. Mater. 4(11), 1860–1866 (2016).
[Crossref]

N. Born, I. Al-Naib, C. Jansen, R. Singh, J. V. Moloney, M. Scheller, and M. Koch, “Terahertz metamaterials with ultrahigh angular sensitivity,” Adv. Opt. Mater. 3(5), 642–645 (2015).
[Crossref]

Y. K. Srivastava, M. Manjappa, H. N. S. Krishnamoorthy, and R. Singh, “Accessing the high-Q dark plasmonic Fano resonances in superconductor metasurfaces,” Adv. Opt. Mater. 4(11), 1875–1881 (2016).
[Crossref]

Y. K. Srivastava, M. Manjappa, L. Cong, W. Cao, I. Al-Naib, W. Zhang, and R. Singh, “Ultrahigh-Q Fano resonances in terahertz metasurfaces: strong influence of metallic conductivity at extremely low asymmetry,” Adv. Opt. Mater. 4(3), 457–463 (2016).
[Crossref]

L. Cong, M. Manjappa, N. Xu, I. Al-Naib, W. Zhang, and R. Singh, “Fano resonances in terahertz metasurfaces: a figure of merit optimization,” Adv. Opt. Mater. 3(11), 1537–1543 (2015).
[Crossref]

Appl. Phys. Lett. (9)

N. I. Zheludev, E. Plum, and V. A. Fedotov, “Metamaterial polarization spectral filter: isolated transmission line at any prescribed wavelength,” Appl. Phys. Lett. 99(17), 171915 (2011).
[Crossref]

R. Singh, W. Cao, I. Al-Naib, L. Cong, W. Withayachumnankul, and W. Zhang, “Ultrasensitive terahertz sensing with high-Q Fano resonances in metasurfaces,” Appl. Phys. Lett. 105(17), 171101 (2014).
[Crossref]

M. Gupta, Y. K. Srivastava, M. Manjappa, and R. Singh, “Sensing with toroidal metamaterial,” Appl. Phys. Lett. 110(12), 121108 (2017).
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N. Born, I. Al-Naib, C. Jansen, T. Ozaki, R. Morandotti, and M. Koch, “Excitation of multiple trapped eigenmodes in terahertz metamolecule lattices,” Appl. Phys. Lett. 104(10), 101107 (2014).
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I. Al-Naib, R. Singh, C. Rockstuhl, F. Lederer, S. Delprat, D. Rocheleau, M. Chaker, T. Ozaki, and R. Morandotti, “Excitation of a high-Q subradiant resonance mode in mirrored single-gap asymmetric split ring resonator terahertz metamaterials,” Appl. Phys. Lett. 101(7), 071108 (2012).
[Crossref]

I. Al-Naib, Y. Yang, M. M. Dignam, W. Zhang, and R. Singh, “Ultra-high Q even eigenmode resonance in terahertz metamaterials,” Appl. Phys. Lett. 106(1), 011102 (2015).
[Crossref]

G. Scalari, C. Maissen, S. Cibella, R. Leoni, and J. Faist, “High quality factor, fully switchable terahertz superconducting metasurface,” Appl. Phys. Lett. 105(26), 261104 (2014).
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C. Jansen, I. Al-Naib, N. Born, and M. Koch, “Terahertz metasurfaces with high Q-factors,” Appl. Phys. Lett. 98(5), 051109 (2011).
[Crossref]

C. Zhang, L. Liang, L. Ding, B. Jin, Y. Hou, C. Li, L. Jiang, W. Liu, W. Hu, Y. Lu, L. Kang, W. Xu, J. Chen, and P. Wu, “Label-free measurements on cell apoptosis using a terahertz metamaterial-based biosensor,” Appl. Phys. Lett. 108(24), 241105 (2016).
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J. Phys. Condens. Matter (1)

S. Yang, X. Xia, Z. Liu, E. Yiwen, Y. Wang, C. Tang, W. Li, J. Li, L. Wang, and C. Gu, “Multispectral plasmon-induced transparency in hyperfine terahertz meta-molecules,” J. Phys. Condens. Matter 28(44), 445002 (2016).
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Light Sci. Appl. (1)

A. Cui, Z. Liu, J. Li, T. H. Shen, X. Xia, Z. Li, Z. Gong, H. Li, B. Wang, J. Li, H. Yang, W. Li, and C. Gu, “Directly patterned substrate-free plasmonic “nanograter” structures with unusual Fano resonances,” Light Sci. Appl. 4(7), e308 (2015).
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Nano Lett. (1)

K. M. Dani, Z. Ku, P. C. Upadhya, R. P. Prasankumar, S. R. J. Brueck, and A. J. Taylor, “Subpicosecond optical switching with a negative index metamaterial,” Nano Lett. 9(10), 3565–3569 (2009).
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Nat. Commun. (2)

S. Zhang, J. Zhou, Y.-S. Park, J. Rho, R. Singh, S. Nam, A. K. Azad, H.-T. Chen, X. Yin, A. J. Taylor, and X. Zhang, “Photoinduced handedness switching in terahertz chiral metamolecules,” Nat. Commun. 3, 942 (2012).
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Y. Yang, I. I. Kravchenko, D. P. Briggs, and J. Valentine, “All-dielectric metasurface analogue of electromagnetically induced transparency,” Nat. Commun. 5, 5753 (2014).
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Nat. Mater. (2)

N. Papasimakis, V. A. Fedotov, V. Savinov, T. A. Raybould, and N. I. Zheludev, “Electromagnetic toroidal excitations in matter and free space,” Nat. Mater. 15(3), 263–271 (2016).
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K. V. Sreekanth, Y. Alapan, M. ElKabbash, E. Ilker, M. Hinczewski, U. A. Gurkan, A. De Luca, and G. Strangi, “Extreme sensitivity biosensing platform based on hyperbolic metamaterials,” Nat. Mater. 15(6), 621–627 (2016).
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Nature (1)

J. Valentine, S. Zhang, T. Zentgraf, E. Ulin-Avila, D. A. Genov, G. Bartal, and X. Zhang, “Three-dimensional optical metamaterial with a negative refractive index,” Nature 455(7211), 376–379 (2008).
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Opt. Express (5)

Opt. Lett. (2)

Phys. Rev. B (7)

T. Q. Li, H. Liu, T. Li, S. M. Wang, J. X. Cao, Z. H. Zhu, Z. G. Dong, S. N. Zhu, and X. Zhang, “Suppression of radiation loss by hybridization effect in two coupled split-ring resonators,” Phys. Rev. B 80(11), 115113 (2009).
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S. Yang, Z. Liu, X. Xia, Y. e, C. Tang, Y. Wang, J. Li, L. Wang, and C. Gu, “Excitation of ultrasharp trapped-mode resonances in mirror-symmetric metamaterials,” Phys. Rev. B 93(23), 235407 (2016).
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Y. Fan, Z. Wei, H. Li, H. Chen, and C. Soukoulis, “Low-loss and high-Q planar metamaterial with toroidal moment,” Phys. Rev. B 87(11), 115417 (2013).
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S. N. Burokur, A. Lupu, and A. Lustrac, “Direct dark mode excitation by symmetry matching of a single-particle-based metasurface,” Phys. Rev. B 91(3), 035104 (2015).
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M. Manjappa, Y. K. Srivastava, and R. Singh, “Lattice-induced transparency in planar metamaterials,” Phys. Rev. B 94, 161103 (2016).

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J. H. Shi, H. F. Ma, W. X. Jiang, and T. J. Cui, “Multiband stereometamaterial-based polarization spectral filter,” Phys. Rev. B 86(3), 035103 (2012).
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Phys. Rev. Lett. (3)

S. Zhang, D. A. Genov, Y. Wang, M. Liu, and X. Zhang, “Plasmon-induced transparency in metamaterials,” Phys. Rev. Lett. 101(4), 047401 (2008).
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I. Al-Naib, E. Hebestreit, C. Rockstuhl, F. Lederer, D. Christodoulides, T. Ozaki, and R. Morandotti, “Conductive coupling of split ring resonators: a path to THz metamaterials with ultrasharp resonances,” Phys. Rev. Lett. 112(18), 183903 (2014).
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V. A. Fedotov, M. Rose, S. L. Prosvirnin, N. Papasimakis, and N. I. Zheludev, “Sharp trapped-mode resonances in planar metamaterials with a broken structural symmetry,” Phys. Rev. Lett. 99(14), 147401 (2007).
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Science (4)

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M. Khorasaninejad, W. T. Chen, R. C. Devlin, J. Oh, A. Y. Zhu, and F. Capasso, “Metalenses at visible wavelengths: diffraction-limited focusing and subwavelength resolution imaging,” Science 352(6290), 1190–1194 (2016).
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Figures (4)

Fig. 1
Fig. 1 (a) Structural schematic of the proposed MBDSRR with detailed geometric dimensions. (b) Scanning electron microscopy (SEM) image of fabricated mirror-symmetry-broken metamaterials.
Fig. 2
Fig. 2 Scanning electron microscopy (SEM) images of samples (a) MDSRR, (b) MBDSRR with δ = 8 μm, and (c) MBDSRR with δ = 17 μm are shown in the left column. The scale bar is 15 µm. The measured and simulated transmission spectra of the corresponding the MSRR and MBDSRR structures are shown in the middle and right columns, respectively. Insets depict the incident electric (E) and magnetic (H) field orientations.
Fig. 3
Fig. 3 Surface current and electric distributions for the MBDSRR structure at (a) and (d) trapped-mode resonance f1, (b) and (e) dipolar resonance f2, (c) and (f) octupolar resonance f3. The simulation results of current and electric field intensities are in arbitrary units (color coded). Notice the current and electric field intensities of octupolar resonance f3 are much larger than those of resonance f1 and f2 .
Fig. 4
Fig. 4 (a) The transmission spectra of the MBDSRR versus the asymmetry parameter δ. The Q factor (left scale) and modulation depth (right scale) achieved of (b) trapped mode f1 and (c) octupolar mode f3 when sweeping δ for the x-polarization.

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