Abstract

Bidirectional surface wave splitters excited by a cylindrical wire in the microwave frequency have been proposed and fabricated. Compared to the bidirectional subwavelength-slit splitter, the novelty of the proposed structure is the coupling mechanism from the cylindrical wire to the surface gratings. By designing the grating structures with different depths and the feeding wire, electromagnetic waves at the designed frequencies will be confined and guided in the predetermined opposite directions. The finite integral time-domain method is used to model the splitters. Experimental results are presented in the microwave frequencies to verify the new structure, which have very good agreements to the simulated results. Based on the same coupling mechanism, a bidirectional surface wave splitter excited by a cylindrical wire in the terahertz (THz) frequencies is further been proposed and modeled. The simulation results demonstrate the validity of the THz splitter.

©2011 Optical Society of America

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2010 (2)

2008 (5)

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Ultrawide-bandwidth slow-light system based on THz plasmonic graded metallic grating structures,” Phys. Rev. Lett. 100(25), 256803 (2008).
[Crossref] [PubMed]

Z. Fu, Q. Q. Gan, Y. J. Ding, and F. J. Bartoli, “From waveguiding to spatial localization of THz waves within a plasmonic metallic grating,” IEEE J. Sel. Top. Quantum Electron. 14(2), 486–490 (2008).
[Crossref]

L. Shen, X. Chen, Y. Zhong, and K. Agarwal, “Effect of absorption on terahertz surface plasmon polaritons propagating along periodically corrugated metal wires,” Phys. Rev. B 77(7), 075408 (2008).
[Crossref]

Z. Fu, Q. Gan, K. Gao, Z. Pan, and F. J. Bartoli, “Numerical Investigation of a Bidirectional Wave Coupler Based on Plasmonic Bragg Gratings in the Near Infrared Domain,” J. Lightwave Technol. 26(22), 3699–3703 (2008).
[Crossref]

H. Caglayan and E. Ozbay, “Surface wave splitter based on metallic gratings with sub-wavelength aperture,” Opt. Express 16(23), 19091–19096 (2008).
[Crossref]

2007 (5)

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Bidirectional subwavelength slit splitter for THz surface plasmons,” Opt. Express 15(26), 18050–18055 (2007).
[Crossref] [PubMed]

A. Agrawal and A. Nahata, “Coupling terahertz radiation onto a metal wire using a subwavelength coaxial aperture,” Opt. Express 15(14), 9022–9028 (2007).
[Crossref] [PubMed]

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

C. Genet and T. W. Ebbesen, “Light in tiny holes,” Nature 445(7123), 39–46 (2007).
[Crossref] [PubMed]

2006 (5)

2005 (3)

T.-I. Jeon, J. Zhang, and D. Grischkowsky, “THz Sommerfeld wave propagation on a single metal wire,” Appl. Phys. Lett. 86(16), 161904 (2005).
[Crossref]

H. Cao and A. Nahata, “Coupling of terahertz pulses onto a single metal wire waveguide using milled grooves,” Opt. Express 13(18), 7028–7034 (2005).
[Crossref] [PubMed]

A. P. Hibbins, B. R. Evans, and J. R. Sambles, “Experimental verification of designer surface plasmons,” Science 308(5722), 670–672 (2005).
[Crossref] [PubMed]

2004 (6)

K. Wang and D. M. Mittleman, “Metal wires for terahertz wave guiding,” Nature 432(7015), 376–379 (2004).
[Crossref] [PubMed]

J. B. Pendry, L. Martin-Moreno, and F. J. Garcia-Vidal, “Mimicking surface plasmons with structured surfaces,” Science 305(5685), 847–848 (2004).
[Crossref] [PubMed]

D. Qu, D. Grischkowsky, and W. Zhang, “Terahertz transmission properties of thin, subwavelength metallic hole arrays,” Opt. Lett. 29(8), 896–898 (2004).
[Crossref] [PubMed]

H. Cao and A. Nahata, “Resonantly enhanced transmission of terahertz radiation through a periodic array of subwavelength apertures,” Opt. Express 12(6), 1004–1010 (2004).
[Crossref] [PubMed]

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

H. J. Lezec and T. Thio, “Diffracted evanescent wave model for enhanced and suppressed optical transmission through subwavelength hole arrays,” Opt. Express 12(16), 3629–3651 (2004).
[Crossref] [PubMed]

2003 (1)

W. L. Barnes, A. Dereux, and T. W. Ebbesen, “Surface plasmon subwavelength optics,” Nature 424(6950), 824–830 (2003).
[Crossref] [PubMed]

2001 (1)

1952 (1)

E. M. T. Jones, “An Annular Corrugated-Surface Antenna,” Proceedings of the IRE 40(6), 721–725 (1952).
[Crossref]

1950 (1)

G. Goubau, “Surface Waves and Their Application to Transmission Lines,” J. Appl. Phys. 21(11), 1119 (1950).
[Crossref]

Agarwal, K.

L. Shen, X. Chen, Y. Zhong, and K. Agarwal, “Effect of absorption on terahertz surface plasmon polaritons propagating along periodically corrugated metal wires,” Phys. Rev. B 77(7), 075408 (2008).
[Crossref]

Agrawal, A.

Andrews, S. R.

S. A. Maier, S. R. Andrews, L. Martín-Moreno, and F. J. García-Vidal, “Terahertz surface plasmon-polariton propagation and focusing on periodically corrugated metal wires,” Phys. Rev. Lett. 97(17), 176805 (2006).
[Crossref] [PubMed]

Barnes, W. L.

W. L. Barnes, A. Dereux, and T. W. Ebbesen, “Surface plasmon subwavelength optics,” Nature 424(6950), 824–830 (2003).
[Crossref] [PubMed]

Bartoli, F. J.

Q. Gan and F. J. Bartoli, “Bidirectional surface wave splitter at visible frequencies,” Opt. Lett. 35(24), 4181–4183 (2010).
[Crossref] [PubMed]

Z. Fu, Q. Q. Gan, Y. J. Ding, and F. J. Bartoli, “From waveguiding to spatial localization of THz waves within a plasmonic metallic grating,” IEEE J. Sel. Top. Quantum Electron. 14(2), 486–490 (2008).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Ultrawide-bandwidth slow-light system based on THz plasmonic graded metallic grating structures,” Phys. Rev. Lett. 100(25), 256803 (2008).
[Crossref] [PubMed]

Z. Fu, Q. Gan, K. Gao, Z. Pan, and F. J. Bartoli, “Numerical Investigation of a Bidirectional Wave Coupler Based on Plasmonic Bragg Gratings in the Near Infrared Domain,” J. Lightwave Technol. 26(22), 3699–3703 (2008).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Bidirectional subwavelength slit splitter for THz surface plasmons,” Opt. Express 15(26), 18050–18055 (2007).
[Crossref] [PubMed]

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

Bozhevolnyi, S. I.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Caglayan, H.

Cao, H.

Chai, L.

Chen, L.

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

Chen, X.

L. Shen, X. Chen, Y. Zhong, and K. Agarwal, “Effect of absorption on terahertz surface plasmon polaritons propagating along periodically corrugated metal wires,” Phys. Rev. B 77(7), 075408 (2008).
[Crossref]

Chen, Y.

Degiron, A.

Deibel, J. A.

Dereux, A.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

W. L. Barnes, A. Dereux, and T. W. Ebbesen, “Surface plasmon subwavelength optics,” Nature 424(6950), 824–830 (2003).
[Crossref] [PubMed]

Devaux, E.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Ding, Y. J.

Z. Fu, Q. Q. Gan, Y. J. Ding, and F. J. Bartoli, “From waveguiding to spatial localization of THz waves within a plasmonic metallic grating,” IEEE J. Sel. Top. Quantum Electron. 14(2), 486–490 (2008).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Ultrawide-bandwidth slow-light system based on THz plasmonic graded metallic grating structures,” Phys. Rev. Lett. 100(25), 256803 (2008).
[Crossref] [PubMed]

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Bidirectional subwavelength slit splitter for THz surface plasmons,” Opt. Express 15(26), 18050–18055 (2007).
[Crossref] [PubMed]

Ebbesen, T. W.

C. Genet and T. W. Ebbesen, “Light in tiny holes,” Nature 445(7123), 39–46 (2007).
[Crossref] [PubMed]

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

W. L. Barnes, A. Dereux, and T. W. Ebbesen, “Surface plasmon subwavelength optics,” Nature 424(6950), 824–830 (2003).
[Crossref] [PubMed]

Escarra, M. D.

Evans, B. R.

A. P. Hibbins, B. R. Evans, and J. R. Sambles, “Experimental verification of designer surface plasmons,” Science 308(5722), 670–672 (2005).
[Crossref] [PubMed]

Fu, Z.

Z. Fu, Q. Gan, K. Gao, Z. Pan, and F. J. Bartoli, “Numerical Investigation of a Bidirectional Wave Coupler Based on Plasmonic Bragg Gratings in the Near Infrared Domain,” J. Lightwave Technol. 26(22), 3699–3703 (2008).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Ultrawide-bandwidth slow-light system based on THz plasmonic graded metallic grating structures,” Phys. Rev. Lett. 100(25), 256803 (2008).
[Crossref] [PubMed]

Z. Fu, Q. Q. Gan, Y. J. Ding, and F. J. Bartoli, “From waveguiding to spatial localization of THz waves within a plasmonic metallic grating,” IEEE J. Sel. Top. Quantum Electron. 14(2), 486–490 (2008).
[Crossref]

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Bidirectional subwavelength slit splitter for THz surface plasmons,” Opt. Express 15(26), 18050–18055 (2007).
[Crossref] [PubMed]

Gan, Q.

Gan, Q. Q.

Z. Fu, Q. Q. Gan, Y. J. Ding, and F. J. Bartoli, “From waveguiding to spatial localization of THz waves within a plasmonic metallic grating,” IEEE J. Sel. Top. Quantum Electron. 14(2), 486–490 (2008).
[Crossref]

Gao, K.

Garcia-Vidal, F. J.

J. B. Pendry, L. Martin-Moreno, and F. J. Garcia-Vidal, “Mimicking surface plasmons with structured surfaces,” Science 305(5685), 847–848 (2004).
[Crossref] [PubMed]

García-Vidal, F. J.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

S. A. Maier, S. R. Andrews, L. Martín-Moreno, and F. J. García-Vidal, “Terahertz surface plasmon-polariton propagation and focusing on periodically corrugated metal wires,” Phys. Rev. Lett. 97(17), 176805 (2006).
[Crossref] [PubMed]

Genet, C.

C. Genet and T. W. Ebbesen, “Light in tiny holes,” Nature 445(7123), 39–46 (2007).
[Crossref] [PubMed]

Gómez Rivas, J.

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

González, M. U.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Goubau, G.

G. Goubau, “Surface Waves and Their Application to Transmission Lines,” J. Appl. Phys. 21(11), 1119 (1950).
[Crossref]

Grischkowsky, D.

Guo, B.

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

Guo, L.

Haring Bolívar, P.

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

Hibbins, A. P.

A. P. Hibbins, B. R. Evans, and J. R. Sambles, “Experimental verification of designer surface plasmons,” Science 308(5722), 670–672 (2005).
[Crossref] [PubMed]

Hu, M.

Janke, C.

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

Jeon, T.-I.

T.-I. Jeon, J. Zhang, and D. Grischkowsky, “THz Sommerfeld wave propagation on a single metal wire,” Appl. Phys. Lett. 86(16), 161904 (2005).
[Crossref]

Jones, E. M. T.

E. M. T. Jones, “An Annular Corrugated-Surface Antenna,” Proceedings of the IRE 40(6), 721–725 (1952).
[Crossref]

Justice, B. J.

Krenn, J. R.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Kurz, H.

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

Lezec, H. J.

Li, Y.

López-Tejeira, F.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Maier, S. A.

S. A. Maier, S. R. Andrews, L. Martín-Moreno, and F. J. García-Vidal, “Terahertz surface plasmon-polariton propagation and focusing on periodically corrugated metal wires,” Phys. Rev. Lett. 97(17), 176805 (2006).
[Crossref] [PubMed]

Martin-Moreno, L.

J. B. Pendry, L. Martin-Moreno, and F. J. Garcia-Vidal, “Mimicking surface plasmons with structured surfaces,” Science 305(5685), 847–848 (2004).
[Crossref] [PubMed]

Martín-Moreno, L.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

S. A. Maier, S. R. Andrews, L. Martín-Moreno, and F. J. García-Vidal, “Terahertz surface plasmon-polariton propagation and focusing on periodically corrugated metal wires,” Phys. Rev. Lett. 97(17), 176805 (2006).
[Crossref] [PubMed]

Mendis, R.

Mittleman, D.

Mittleman, D. M.

Mock, J. J.

Nahata, A.

Ozbay, E.

H. Caglayan and E. Ozbay, “Surface wave splitter based on metallic gratings with sub-wavelength aperture,” Opt. Express 16(23), 19091–19096 (2008).
[Crossref]

E. Ozbay, “Plasmonics: merging photonics and electronics at nanoscale dimensions,” Science 311(5758), 189–193 (2006).
[Crossref] [PubMed]

Pan, Z.

Pellemans, H. P. M.

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

Pendry, J. B.

J. B. Pendry, L. Martin-Moreno, and F. J. Garcia-Vidal, “Mimicking surface plasmons with structured surfaces,” Science 305(5685), 847–848 (2004).
[Crossref] [PubMed]

Qu, D.

Radko, I. P.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Rodrigo, S. G.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Sambles, J. R.

A. P. Hibbins, B. R. Evans, and J. R. Sambles, “Experimental verification of designer surface plasmons,” Science 308(5722), 670–672 (2005).
[Crossref] [PubMed]

Saxler, J.

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

Schurig, D.

Shen, L.

L. Shen, X. Chen, Y. Zhong, and K. Agarwal, “Effect of absorption on terahertz surface plasmon polaritons propagating along periodically corrugated metal wires,” Phys. Rev. B 77(7), 075408 (2008).
[Crossref]

Smith, D. R.

Song, G.

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

Song, Z.

Thio, T.

Wang, C.-Y.

Wang, K.

Weeber, J. C.

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
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Xing, Q.

Zhan, H.

Zhang, J.

T.-I. Jeon, J. Zhang, and D. Grischkowsky, “THz Sommerfeld wave propagation on a single metal wire,” Appl. Phys. Lett. 86(16), 161904 (2005).
[Crossref]

Zhang, W.

Zhang, Z.

Zhong, Y.

L. Shen, X. Chen, Y. Zhong, and K. Agarwal, “Effect of absorption on terahertz surface plasmon polaritons propagating along periodically corrugated metal wires,” Phys. Rev. B 77(7), 075408 (2008).
[Crossref]

Appl. Phys. Lett. (2)

T.-I. Jeon, J. Zhang, and D. Grischkowsky, “THz Sommerfeld wave propagation on a single metal wire,” Appl. Phys. Lett. 86(16), 161904 (2005).
[Crossref]

Q. Gan, B. Guo, G. Song, L. Chen, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Plasmonic Surface-Wave Splitter,” Appl. Phys. Lett. 90(16), 161130 (2007).
[Crossref]

IEEE J. Sel. Top. Quantum Electron. (1)

Z. Fu, Q. Q. Gan, Y. J. Ding, and F. J. Bartoli, “From waveguiding to spatial localization of THz waves within a plasmonic metallic grating,” IEEE J. Sel. Top. Quantum Electron. 14(2), 486–490 (2008).
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G. Goubau, “Surface Waves and Their Application to Transmission Lines,” J. Appl. Phys. 21(11), 1119 (1950).
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Nat. Phys. (1)

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. García-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. González, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
[Crossref]

Nature (3)

C. Genet and T. W. Ebbesen, “Light in tiny holes,” Nature 445(7123), 39–46 (2007).
[Crossref] [PubMed]

K. Wang and D. M. Mittleman, “Metal wires for terahertz wave guiding,” Nature 432(7015), 376–379 (2004).
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W. L. Barnes, A. Dereux, and T. W. Ebbesen, “Surface plasmon subwavelength optics,” Nature 424(6950), 824–830 (2003).
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Opt. Express (10)

H. Zhan, R. Mendis, and D. M. Mittleman, “Superfocusing terahertz waves below λ/250 using plasmonic parallel-plate waveguides,” Opt. Express 18(9), 9643–9650 (2010).
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H. Cao and A. Nahata, “Resonantly enhanced transmission of terahertz radiation through a periodic array of subwavelength apertures,” Opt. Express 12(6), 1004–1010 (2004).
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H. J. Lezec and T. Thio, “Diffracted evanescent wave model for enhanced and suppressed optical transmission through subwavelength hole arrays,” Opt. Express 12(16), 3629–3651 (2004).
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H. Cao and A. Nahata, “Coupling of terahertz pulses onto a single metal wire waveguide using milled grooves,” Opt. Express 13(18), 7028–7034 (2005).
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J. A. Deibel, K. Wang, M. D. Escarra, and D. Mittleman, “Enhanced coupling of terahertz radiation to cylindrical wire waveguides,” Opt. Express 14(1), 279–290 (2006).
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B. J. Justice, J. J. Mock, L. Guo, A. Degiron, D. Schurig, and D. R. Smith, “Spatial mapping of the internal and external electromagnetic fields of negative index metamaterials,” Opt. Express 14(19), 8694–8705 (2006).
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Y. Chen, Z. Song, Y. Li, M. Hu, Q. Xing, Z. Zhang, L. Chai, and C.-Y. Wang, “Effective surface plasmon polaritons on the metal wire with arrays of subwavelength grooves,” Opt. Express 14(26), 13021–13029 (2006).
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A. Agrawal and A. Nahata, “Coupling terahertz radiation onto a metal wire using a subwavelength coaxial aperture,” Opt. Express 15(14), 9022–9028 (2007).
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Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Bidirectional subwavelength slit splitter for THz surface plasmons,” Opt. Express 15(26), 18050–18055 (2007).
[Crossref] [PubMed]

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[Crossref]

Opt. Lett. (3)

Phys. Rev. B (2)

J. Saxler, J. Gómez Rivas, C. Janke, H. P. M. Pellemans, P. Haring Bolívar, and H. Kurz, “Time-domain measurements of surface plasmon polaritons in the terahertz frequency range,” Phys. Rev. B 69(15), 155427 (2004).
[Crossref]

L. Shen, X. Chen, Y. Zhong, and K. Agarwal, “Effect of absorption on terahertz surface plasmon polaritons propagating along periodically corrugated metal wires,” Phys. Rev. B 77(7), 075408 (2008).
[Crossref]

Phys. Rev. Lett. (2)

Q. Gan, Z. Fu, Y. J. Ding, and F. J. Bartoli, “Ultrawide-bandwidth slow-light system based on THz plasmonic graded metallic grating structures,” Phys. Rev. Lett. 100(25), 256803 (2008).
[Crossref] [PubMed]

S. A. Maier, S. R. Andrews, L. Martín-Moreno, and F. J. García-Vidal, “Terahertz surface plasmon-polariton propagation and focusing on periodically corrugated metal wires,” Phys. Rev. Lett. 97(17), 176805 (2006).
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A. P. Hibbins, B. R. Evans, and J. R. Sambles, “Experimental verification of designer surface plasmons,” Science 308(5722), 670–672 (2005).
[Crossref] [PubMed]

E. Ozbay, “Plasmonics: merging photonics and electronics at nanoscale dimensions,” Science 311(5758), 189–193 (2006).
[Crossref] [PubMed]

J. B. Pendry, L. Martin-Moreno, and F. J. Garcia-Vidal, “Mimicking surface plasmons with structured surfaces,” Science 305(5685), 847–848 (2004).
[Crossref] [PubMed]

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Figures (4)

Fig. 1
Fig. 1 (a) The sketch of the bidirectional surface wave splitter excited by a cylindrical wire; (b) Dispersion curves calculated for w = 2 m m and p = 5 m m with groove depths h = 5 m m and h = 11 m m . The solid curve and the solid circles correspond to the analytical solutions from Eq. (1) and the calculated results with the eigenmode solver of CST MWS, when the lengthLof the structure is infinite. The dashed curve shows the calculated results when the lengthLof the structure is 10 m m . (c) and (d) provide the eigenmode frequencies with different structure lengths, when β = π / p . The groove depths in (c) and (d) are h = 5 m m and h = 11 m m , respectively.

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Fig. 2
Fig. 2 (a) The sketch of the bidirectional splitter consisting of two grooved aluminum plates. The coaxial feedline is SFT-50-3 cable. The inner conductors of the cable are extended 8 m m . (b) The control structure with two smooth aluminum plates on different sides of the cable. (c) The photograph of the field mapping experiment setup. The coaxial detecting probe is mounted onto the stationary upper plate which is lifted now. The lower plate is mounted to two computer-controlled linear translation stages, enabling a scanning area of 20 c m by 20 c m with a resolution of 1 m m . The detecting probe is SFT-50-1 cable. The inner conductor of the probe is extended 2 m m and bended 90 degrees in order to sample the z-component of the electric fields.

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Fig. 3
Fig. 3 Results obtained from the FIT simulations and experiments. (a)-(f) 2D distributions of the z-component electric fields on the xz-plane which is 2 m m away from the structure, and 1D distributions of the z-component electric fields along the line (the white dashed line in (a)) which is 2 m m above the surface of the structure, respectively. The structure in (a) and (b) consists of two smooth aluminum plates and the observed frequency is 10GHz. The structure in (c)-(f) consists of two grooved aluminum plates. The width (w) and periodicity (p) of the gratings are 2 m m and 5 m m , respectively. The depths (h) of the left-hand side and right-hand side gratings are 5 m m and 11 m m . The observed frequency in (c) and (d) is 5GHz, and the observed frequency in (e) and (f) is 10GHz. The results in (a), (c) and (e) are obtained from FIT simulations, while the results in (b), (d) and (f) are obtained from experiments. The thicknessH and lengthL of the metal are 40 m m and 10 m m , respectively.

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Fig. 4
Fig. 4 The FIT simulation results of the bidirectional surface wave splitter in the THz frequencies: The 2D field distributions on the y = 0 plane and the optical intensity ( | E | 2 ) distribution on the line 2 μ m above the surface of the structure. The observed frequencies are 0.5 THz in (a) and 1.0 THz in (b), respectively. The lengthLof the metal splitter is 100 μ m , and the outer diameterdof the metal wire and the shielding conductor on the bottom are 80 μ m and 200 μ m , respectively.

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Equations (1)

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w p ∑ n = − ∞ ∞ 1 τ n h ( sin c β n w 2 ) 2 = cot k h k h

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