Abstract

We fabricated plasmonic devices operating in the terahertz (THz) frequency range using silver nanowire (AgNW) network films. AgNW films exhibit high conductivity and good transparency in the visible range, with a figure of merit comparable to that of conventional transparent conducting oxide films. The THz conductivity of AgNW films can be improved by post-treatment procedures such as welding using graphene oxide flakes. Using photolithography, we fabricated the slot antenna arrays whose resonance behaviors are determined by geometric parameters such as the length of individual elements. The plasmonic resonance varied with the sheet resistances of the film, enabling us to manipulate the quality factors and the peak position of the resonance, in particular, by controlling the films thickness and by the post-procedures such as the chemical vapor treatment.

© 2017 Optical Society of America

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  2. G. Eda and M. Chhowalla, “Chemically derived graphene oxide: towards large-area thin-film electronics and optoelectronics,” Adv. Mater. 22(22), 2392–2415 (2010).
  3. M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).
  4. J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).
  5. J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).
  6. J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).
  7. S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).
  8. J. T. Hong, J.-Y. Park, S. Lee, and Y. H. Ahn, “UV-induced terahertz wave modulation in free-standing ZnO nanowire films,” Opt. Mater. Express 6(12), 3751–3758 (2016).
  9. S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).
  10. S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).
  11. N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).
  12. S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).
  13. S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).
  14. M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).
  15. D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).
  16. 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).
  17. J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science 312(5781), 1780–1782 (2006).
  18. J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).
  19. Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).
  20. D. S. Hecht, L. Hu, and G. Irvin, “Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures,” Adv. Mater. 23(13), 1482–1513 (2011).
  21. J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).
  22. S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).
  23. J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).
  24. M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).
  25. M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).
  26. D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).
  27. S. S. Yoon and D. Y. Khang, “Room-temperature chemical welding and sintering of metallic nanostructures by capillary condensation,” Nano Lett. 16(6), 3550–3556 (2016).
  28. J. A. Schuller and M. L. Brongersma, “General properties of dielectric optical antennas,” Opt. Express 17(26), 24084–24095 (2009).
  29. S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).
  30. B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

2016 (2)

S. S. Yoon and D. Y. Khang, “Room-temperature chemical welding and sintering of metallic nanostructures by capillary condensation,” Nano Lett. 16(6), 3550–3556 (2016).

J. T. Hong, J.-Y. Park, S. Lee, and Y. H. Ahn, “UV-induced terahertz wave modulation in free-standing ZnO nanowire films,” Opt. Mater. Express 6(12), 3751–3758 (2016).

2015 (1)

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

2014 (4)

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

2013 (5)

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

2012 (1)

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

2011 (1)

D. S. Hecht, L. Hu, and G. Irvin, “Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures,” Adv. Mater. 23(13), 1482–1513 (2011).

2010 (3)

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

G. Eda and M. Chhowalla, “Chemically derived graphene oxide: towards large-area thin-film electronics and optoelectronics,” Adv. Mater. 22(22), 2392–2415 (2010).

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

2009 (4)

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).

J. A. Schuller and M. L. Brongersma, “General properties of dielectric optical antennas,” Opt. Express 17(26), 24084–24095 (2009).

2008 (2)

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

2007 (1)

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

2006 (3)

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).

J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science 312(5781), 1780–1782 (2006).

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

2005 (1)

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).

2004 (1)

L. Hu, D. S. Hecht, and G. Grüner, “Percolation in transparent and conducting carbon nanotube networks,” Nano Lett. 4(12), 2513–2517 (2004).

2001 (1)

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Adam, A. J. L.

Ahn, H.

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

Ahn, J.-H.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Ahn, K. J.

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

Ahn, Y. H.

J. T. Hong, J.-Y. Park, S. Lee, and Y. H. Ahn, “UV-induced terahertz wave modulation in free-standing ZnO nanowire films,” Opt. Mater. Express 6(12), 3751–3758 (2016).

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

Atwater, H. A.

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Bae, S.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Balakrishnan, J.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Bao, Z.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Blau, W. J.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Boland, J. J.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Bozhevolnyi, S. I.

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

Breese, M. B. H.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Brongersma, M. L.

J. A. Schuller and M. L. Brongersma, “General properties of dielectric optical antennas,” Opt. Express 17(26), 24084–24095 (2009).

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Chae, G.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Chang, C.-Y.

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

Chen, Y.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Chhowalla, M.

G. Eda and M. Chhowalla, “Chemically derived graphene oxide: towards large-area thin-film electronics and optoelectronics,” Adv. Mater. 22(22), 2392–2415 (2010).

Choi, H.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Choi, S. B.

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).

Choi, S. J.

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

Choi, S. S.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Coleman, J. N.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Cooke, D. G.

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

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).

De, S.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

de Mello, J. C.

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

Devaux, E.

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

Doherty, E. M.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Ebbesen, T. W.

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

Eda, G.

G. Eda and M. Chhowalla, “Chemically derived graphene oxide: towards large-area thin-film electronics and optoelectronics,” Adv. Mater. 22(22), 2392–2415 (2010).

Fang, N.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).

Fernández-Domínguez, A. I.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Freeman, M. R.

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

Gao, Y.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Grüner, G.

L. Hu, D. S. Hecht, and G. Grüner, “Percolation in transparent and conducting carbon nanotube networks,” Nano Lett. 4(12), 2513–2517 (2004).

Guo, X.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Hajar, M.

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

Hammock, M.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Han, S. T.

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

Hanham, S. M.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Hecht, D. S.

D. S. Hecht, L. Hu, and G. Irvin, “Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures,” Adv. Mater. 23(13), 1482–1513 (2011).

L. Hu, D. S. Hecht, and G. Grüner, “Percolation in transparent and conducting carbon nanotube networks,” Nano Lett. 4(12), 2513–2517 (2004).

Hegmann, F. A.

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

Hellstrom, S. L.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Higgins, T. M.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Hong, B. H.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Hong, J. T.

J. T. Hong, J.-Y. Park, S. Lee, and Y. H. Ahn, “UV-induced terahertz wave modulation in free-standing ZnO nanowire films,” Opt. Mater. Express 6(12), 3751–3758 (2016).

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

Hong, M.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Hu, L.

D. S. Hecht, L. Hu, and G. Irvin, “Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures,” Adv. Mater. 23(13), 1482–1513 (2011).

L. Hu, D. S. Hecht, and G. Grüner, “Percolation in transparent and conducting carbon nanotube networks,” Nano Lett. 4(12), 2513–2517 (2004).

Hu, S.

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

Hu, W.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Huang, X.

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

Hwang, Y.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Iijima, S.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Irfan, I.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Irvin, G.

D. S. Hecht, L. Hu, and G. Irvin, “Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures,” Adv. Mater. 23(13), 1482–1513 (2011).

Jeong, H.

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

Jeong, M. S.

Jeong Lee, S.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Jia, C.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Joe, S. Y.

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

Jun, M.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Jung, J.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Justice, B. 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).

Kang, C.

Kang, J. H.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

Khang, D. Y.

S. S. Yoon and D. Y. Khang, “Room-temperature chemical welding and sintering of metallic nanostructures by capillary condensation,” Nano Lett. 16(6), 3550–3556 (2016).

Kik, P. G.

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Kim, C.-H.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Kim, D. S.

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

Kim, H.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Kim, H. R.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Kim, H. S.

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

Kim, J.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Kim, K.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Kim, K. S.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Kim, Y.-J.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Klein, N.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Koo, S. M.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Lai, Y.-C.

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

Laluet, J.-Y.

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

Lee, H.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).

Lee, J.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Lee, J. W.

Lee, K.

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

Lee, K. M.

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

Lee, S.

J. T. Hong, J.-Y. Park, S. Lee, and Y. H. Ahn, “UV-induced terahertz wave modulation in free-standing ZnO nanowire films,” Opt. Mater. Express 6(12), 3751–3758 (2016).

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

Lee, Y.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Lei, T.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Li, L.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Liang, J.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Liew, Y. F.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Lim, H.

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

Liu, J.

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

Lyons, P. E.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Maeng, I.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Maier, S. A.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Meltzer, S.

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

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).

Myoung, J.-M.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Ng, B.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Nirmalraj, P. N.

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Niu, X.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Ozyilmaz, B.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Pang, C.

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

Park, D. J.

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).

Park, G. S.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Park, H. R.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Park, J. K.

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

Park, J. Y.

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

Park, J.-S.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Park, J.-Y.

J. T. Hong, J.-Y. Park, S. Lee, and Y. H. Ahn, “UV-induced terahertz wave modulation in free-standing ZnO nanowire films,” Opt. Mater. Express 6(12), 3751–3758 (2016).

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

Park, N. K.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Park, Q. H.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

Park, S. J.

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

Park, W. K.

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

Pei, Q.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Pendry, J. B.

J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science 312(5781), 1780–1782 (2006).

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).

Planken, P. C. M.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

Ren, Z.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Requicha, A. A. G.

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Rotermund, F.

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

D. J. Park, S. B. Choi, Y. H. Ahn, F. Rotermund, I. B. Sohn, C. Kang, M. S. Jeong, and D. S. Kim, “Terahertz near-field enhancement in narrow rectangular apertures on metal film,” Opt. Express 17(15), 12493–12501 (2009).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

Schuller, J. A.

Schurig, D.

J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science 312(5781), 1780–1782 (2006).

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).

Seo, M. A.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

M. A. Seo, A. J. L. Adam, J. H. Kang, J. W. Lee, K. J. Ahn, Q. H. Park, P. C. M. Planken, and D. S. Kim, “Near field imaging of terahertz focusing onto rectangular apertures,” Opt. Express 16(25), 20484–20489 (2008).

Sherstan, C.

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

Smith, D. R.

J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science 312(5781), 1780–1782 (2006).

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).

Sohn, I. B.

Son, B. H.

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

J. T. Hong, K. M. Lee, B. H. Son, S. J. Park, D. J. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Terahertz conductivity of reduced graphene oxide films,” Opt. Express 21(6), 7633–7640 (2013).

Son, J.-H.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Song, H.

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

Song, Y. I.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

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).

Stoltenberg, R. M.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Sun, C.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).

Suwal, O. K.

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Tong, K.

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

Tsai, Y.-J.

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

Volkov, V. S.

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

Vosgueritchian, M.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Walther, M.

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

Wang, Y. B.

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

Wu, J.

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Xiao, B.

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

Xu, X.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Yang, H.

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

Yim, J. H.

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

Yoon, S. S.

S. S. Yoon and D. Y. Khang, “Room-temperature chemical welding and sintering of metallic nanostructures by capillary condensation,” Nano Lett. 16(6), 3550–3556 (2016).

Yu, P.-C.

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

Zhang, X.

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).

Zheng, Y.

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

ACS Appl. Mater. Interfaces (1)

Y.-J. Tsai, C.-Y. Chang, Y.-C. Lai, P.-C. Yu, and H. Ahn, “Realization of metal-insulator transition and oxidation in silver nanowire percolating networks by terahertz reflection spectroscopy,” ACS Appl. Mater. Interfaces 6(1), 630–635 (2014).

ACS Nano (3)

J. Liang, L. Li, K. Tong, Z. Ren, W. Hu, X. Niu, Y. Chen, and Q. Pei, “Silver nanowire percolation network soldered with graphene oxide at room temperature and its application for fully stretchable polymer light-emitting diodes,” ACS Nano 8(2), 1590–1600 (2014).

J. H. Yim, S. Y. Joe, C. Pang, K. M. Lee, H. Jeong, J.-Y. Park, Y. H. Ahn, J. C. de Mello, and S. Lee, “Fully solution-processed semitransparent organic solar cells with a silver nanowire cathode and a conducting polymer anode,” ACS Nano 8(3), 2857–2863 (2014).

S. De, T. M. Higgins, P. E. Lyons, E. M. Doherty, P. N. Nirmalraj, W. J. Blau, J. J. Boland, and J. N. Coleman, “Silver nanowire networks as flexible, transparent, conducting films: extremely high dc to optical conductivity ratios,” ACS Nano 3(7), 1767–1774 (2009).

Adv. Mater. (3)

G. Eda and M. Chhowalla, “Chemically derived graphene oxide: towards large-area thin-film electronics and optoelectronics,” Adv. Mater. 22(22), 2392–2415 (2010).

D. S. Hecht, L. Hu, and G. Irvin, “Emerging Transparent Electrodes Based on Thin Films of Carbon Nanotubes, Graphene, and Metallic Nanostructures,” Adv. Mater. 23(13), 1482–1513 (2011).

S. A. Maier, M. L. Brongersma, P. G. Kik, S. Meltzer, A. A. G. Requicha, and H. A. Atwater, “Plasmonics—A route to nanoscale optical devices,” Adv. Mater. 13(19), 1501–1505 (2001).

Adv. Opt. Mater. (1)

B. Ng, J. Wu, S. M. Hanham, A. I. Fernández-Domínguez, N. Klein, Y. F. Liew, M. B. H. Breese, M. Hong, and S. A. Maier, “Spoof plasmon surfaces: a novel platform for THz sensing,” Adv. Opt. Mater. 1(8), 543–548 (2013).

Appl. Phys. Lett. (2)

J. Kim, I. Maeng, J. Jung, H. Song, J.-H. Son, K. Kim, J. Lee, C.-H. Kim, G. Chae, M. Jun, Y. Hwang, S. Jeong Lee, J.-M. Myoung, and H. Choi, “Terahertz time-domain measurement of non-Drude conductivity in silver nanowire thin films for transparent electrode applications,” Appl. Phys. Lett. 102(1), 011109 (2013).

M. A. Seo, J. H. Yim, Y. H. Ahn, F. Rotermund, D. S. Kim, S. Lee, and H. Lim, “Terahertz electromagnetic interference shielding using single-walled carbon nanotube flexible films,” Appl. Phys. Lett. 93(23), 231905 (2008).

Carbon (1)

J. Liu, H. Jeong, J. Liu, K. Lee, J.-Y. Park, Y. H. Ahn, and S. Lee, “Reduction of functionalized graphite oxides by trioctylphosphine in non-polar organic solvents,” Carbon 48(8), 2282–2289 (2010).

Curr. Appl. Phys. (1)

D. J. Park, J. T. Hong, J. K. Park, S. B. Choi, B. H. Son, F. Rotermund, S. Lee, K. J. Ahn, D. S. Kim, and Y. H. Ahn, “Resonant transmission of terahertz waves through metallic slot antennas on various dielectric substrates,” Curr. Appl. Phys. 13(4), 753–757 (2013).

J. Appl. Phys. (1)

S. Hu, H. Yang, S. T. Han, X. Huang, and B. Xiao, “Tailoring dual-band electromagnetically induced transparency in planar metamaterials,” J. Appl. Phys. 117(4), 043107 (2015).

J. Phys. Chem. Lett. (1)

J. T. Hong, D. J. Park, J. H. Yim, J. K. Park, J.-Y. Park, S. Lee, and Y. H. Ahn, “Dielectric constant engineering of single-walled carbon nanotube films for metamaterials and plasmonic devices,” J. Phys. Chem. Lett. 4(22), 3950–3957 (2013).

Nano Lett. (3)

L. Hu, D. S. Hecht, and G. Grüner, “Percolation in transparent and conducting carbon nanotube networks,” Nano Lett. 4(12), 2513–2517 (2004).

S. L. Hellstrom, M. Vosgueritchian, R. M. Stoltenberg, I. Irfan, M. Hammock, Y. B. Wang, C. Jia, X. Guo, Y. Gao, and Z. Bao, “Strong and stable doping of carbon nanotubes and graphene by MoOx for transparent electrodes,” Nano Lett. 12(7), 3574–3580 (2012).

S. S. Yoon and D. Y. Khang, “Room-temperature chemical welding and sintering of metallic nanostructures by capillary condensation,” Nano Lett. 16(6), 3550–3556 (2016).

Nat. Nanotechnol. (1)

S. Bae, H. Kim, Y. Lee, X. Xu, J.-S. Park, Y. Zheng, J. Balakrishnan, T. Lei, H. R. Kim, Y. I. Song, Y.-J. Kim, K. S. Kim, B. Ozyilmaz, J.-H. Ahn, B. H. Hong, and S. Iijima, “Roll-to-roll production of 30-inch graphene films for transparent electrodes,” Nat. Nanotechnol. 5(8), 574–578 (2010).

Nat. Photonics (1)

M. A. Seo, H. R. Park, S. M. Koo, D. J. Park, J. H. Kang, O. K. Suwal, S. S. Choi, P. C. M. Planken, G. S. Park, N. K. Park, Q. H. Park, and D. S. Kim, “Terahertz field enhancement by a metallic nano slit operating beyond the skin-depth limit,” Nat. Photonics 3(3), 152–156 (2009).

Nature (1)

S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide components including interferometers and ring resonators,” Nature 440(7083), 508–511 (2006).

Opt. Express (4)

Opt. Mater. Express (1)

Phys. Rev. B (1)

M. Walther, D. G. Cooke, C. Sherstan, M. Hajar, M. R. Freeman, and F. A. Hegmann, “Terahertz conductivity of thin gold films at the metal-insulator percolation transition,” Phys. Rev. B 76(12), 125408 (2007).

Sci. Rep. (1)

S. J. Park, J. T. Hong, S. J. Choi, H. S. Kim, W. K. Park, S. T. Han, J. Y. Park, S. Lee, D. S. Kim, and Y. H. Ahn, “Detection of microorganisms using terahertz metamaterials,” Sci. Rep. 4, 4988 (2014).

Science (3)

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).

J. B. Pendry, D. Schurig, and D. R. Smith, “Controlling electromagnetic fields,” Science 312(5781), 1780–1782 (2006).

N. Fang, H. Lee, C. Sun, and X. Zhang, “Sub-diffraction-limited optical imaging with a silver superlens,” Science 308(5721), 534–537 (2005).

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Figures (5)

Fig. 1
Fig. 1

(a) SEM image of AgNW network film. (b) Photograph of AgNW network film on quartz substrate with different thicknesses. (c) Optical transmission spectra for different spin-coating times. (d) FOM of an ITO film and AgNW network films with different Rs’s.

Fig. 2
Fig. 2

(a) Time trace of THz transmission through a AgNW network film for N = 4 (red curve), shown together with free-space reference (black curve). (b) THz transmission spectra of AgNW network films with different spin-coating times (N), before (dash) and after (solid) GO treatment. (c) Plot of THz transmission amplitude at 1 THz as a function of N for pristine (black) and GO-treated (red) films.

Fig. 3
Fig. 3

(a) Schematic of slot antenna array fabricated on AgNW films. (b) SEM image of rectangular slot antenna arrays with lengths of l = 140 μm. (c) THz transmission spectra for a bare AgNW network film (black curve), a plasmonic device with TE polarization (blue curve, parallel to the long axis of the rectangle) and with TM polarization (red curve, perpendicular to the long axis of the rectangle: See red arrow in (b)). (d) THz transmission spectra for TM polarization at various l values from 60 μm to 170 μm.

Fig. 4
Fig. 4

(a) THz transmission amplitudes for the AgNW plasmonic device with the different Rs’s. (b) Plot of resonance frequency (red) and Q-factor (blue) for the AgNW plasmonic device as a function of the Rs. (c) THz transmission amplitudes for the plasmonic device based on Ag bulk films with different thickness.

Fig. 5
Fig. 5

(a) Schematic of the AgNW plasmonic device with H2O2 treatments. (b) Plot of Rs for the AgNW film as a function of H2O2 exposure time. (c) THz transmission spectra of the AgNW plasmonic device for different exposure times. (d) Plot Q-factor for the AgNW plasmonic device as a function of the H2O2 exposure times.

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