Abstract

A dielectric–film–coated asymmetric single nanoslit is proposed to realize broadband unidirectional generation of surface plasmon polaritons (SPPs). Due to the tight field confinements by the dielectric film and the deep groove in the asymmetric single slit, the transmittance of the SPPs in the groove to the left side considerably decreases. This greatly suppresses the left–propagating SPP generation efficiency for a broad bandwidth. Meanwhile, the right–propagating SPP generation efficiency has a flat spectra range because of the low transmittance, too. So the unidirectional SPP generation with bandwidth of >100 nm around λ = 750 nm is experimentally achieved for the device lateral dimension of only 865 nm.

© 2011 OSA

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    [CrossRef] [PubMed]
  2. D. K. Gramotnev and S. I. Bozhevolnyi, “Plasmonics beyond the diffraction limit,” Nat. Photonics 4(2), 83–91 (2010).
    [CrossRef]
  3. T. W. Ebbesen, C. Genet, and S. I. Bozhevolnyi, “Surface-plasmon circuitry,” Phys. Today 61(5), 44–50 (2008).
    [CrossRef]
  4. J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
    [CrossRef] [PubMed]
  5. F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. Garcia-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. Gonzalez, J. C. Weeber, and A. Dereux, “Efficient unidirectional nanoslit couplers for surface plasmons,” Nat. Phys. 3(5), 324–328 (2007).
    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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2011

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
[CrossRef] [PubMed]

X. W. Li, Q. F. Tan, B. F. Bai, and G. F. Jin, “Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit,” Appl. Phys. Lett. 98(25), 251109 (2011).
[CrossRef]

2010

D. K. Gramotnev and S. I. Bozhevolnyi, “Plasmonics beyond the diffraction limit,” Nat. Photonics 4(2), 83–91 (2010).
[CrossRef]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Efficient unidirectional generation of surface plasmon polaritons with an asymmetric single-nanoslit,” Appl. Phys. Lett. 97(4), 041113 (2010).
[CrossRef]

E. Verhagen, L. K. Kuipers, and A. Polman, “Plasmonic nanofocusing in a dielectric wedge,” Nano Lett. 10(9), 3665–3669 (2010).
[CrossRef] [PubMed]

2009

I. P. Radko, S. I. Bozhevolnyi, G. Brucoli, L. Martín-Moreno, F. J. García-Vidal, and A. Boltasseva, “Efficient unidirectional ridge excitation of surface plasmons,” Opt. Express 17(9), 7228–7232 (2009).
[CrossRef] [PubMed]

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

H. Kim and B. Lee, “Unidirectional surface plasmon polariton excitation on single slit with oblique backside illumination,” Plasmonics 4(2), 153–159 (2009).
[CrossRef]

2008

T. W. Ebbesen, C. Genet, and S. I. Bozhevolnyi, “Surface-plasmon circuitry,” Phys. Today 61(5), 44–50 (2008).
[CrossRef]

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

2007

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

2003

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

1972

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6(12), 4370–4379 (1972).
[CrossRef]

Aigouy, L.

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

Bai, B. F.

X. W. Li, Q. F. Tan, B. F. Bai, and G. F. Jin, “Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit,” Appl. Phys. Lett. 98(25), 251109 (2011).
[CrossRef]

Barnes, W. L.

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

Bartal, G.

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

Boltasseva, A.

Bourhis, E.

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

Bozhevolnyi, S. I.

D. K. Gramotnev and S. I. Bozhevolnyi, “Plasmonics beyond the diffraction limit,” Nat. Photonics 4(2), 83–91 (2010).
[CrossRef]

I. P. Radko, S. I. Bozhevolnyi, G. Brucoli, L. Martín-Moreno, F. J. García-Vidal, and A. Boltasseva, “Efficient unidirectional ridge excitation of surface plasmons,” Opt. Express 17(9), 7228–7232 (2009).
[CrossRef] [PubMed]

T. W. Ebbesen, C. Genet, and S. I. Bozhevolnyi, “Surface-plasmon circuitry,” Phys. Today 61(5), 44–50 (2008).
[CrossRef]

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

Brucoli, G.

Chen, J. J.

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
[CrossRef] [PubMed]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Efficient unidirectional generation of surface plasmon polaritons with an asymmetric single-nanoslit,” Appl. Phys. Lett. 97(4), 041113 (2010).
[CrossRef]

Christy, R. W.

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6(12), 4370–4379 (1972).
[CrossRef]

Dereux, A.

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

Du, C. L.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

Ebbesen, T. W.

T. W. Ebbesen, C. Genet, and S. I. Bozhevolnyi, “Surface-plasmon circuitry,” Phys. Today 61(5), 44–50 (2008).
[CrossRef]

F. López-Tejeira, S. G. Rodrigo, L. Martín-Moreno, F. J. Garcia-Vidal, E. Devaux, T. W. Ebbesen, J. R. Krenn, I. P. Radko, S. I. Bozhevolnyi, M. U. Gonzalez, 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]

Gan, D. C.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

Garcia-Vidal, F. J.

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

García-Vidal, F. J.

Genet, C.

T. W. Ebbesen, C. Genet, and S. I. Bozhevolnyi, “Surface-plasmon circuitry,” Phys. Today 61(5), 44–50 (2008).
[CrossRef]

Gierak, J.

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

Gong, Q. H.

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
[CrossRef] [PubMed]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Efficient unidirectional generation of surface plasmon polaritons with an asymmetric single-nanoslit,” Appl. Phys. Lett. 97(4), 041113 (2010).
[CrossRef]

Gonzalez, M. U.

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

Gramotnev, D. K.

D. K. Gramotnev and S. I. Bozhevolnyi, “Plasmonics beyond the diffraction limit,” Nat. Photonics 4(2), 83–91 (2010).
[CrossRef]

Hugonin, J. P.

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

Jin, G. F.

X. W. Li, Q. F. Tan, B. F. Bai, and G. F. Jin, “Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit,” Appl. Phys. Lett. 98(25), 251109 (2011).
[CrossRef]

Johnson, P. B.

P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6(12), 4370–4379 (1972).
[CrossRef]

Kim, H.

H. Kim and B. Lee, “Unidirectional surface plasmon polariton excitation on single slit with oblique backside illumination,” Plasmonics 4(2), 153–159 (2009).
[CrossRef]

Krenn, J. R.

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

Kuipers, L. K.

E. Verhagen, L. K. Kuipers, and A. Polman, “Plasmonic nanofocusing in a dielectric wedge,” Nano Lett. 10(9), 3665–3669 (2010).
[CrossRef] [PubMed]

Lalanne, P.

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

Lee, B.

H. Kim and B. Lee, “Unidirectional surface plasmon polariton excitation on single slit with oblique backside illumination,” Plasmonics 4(2), 153–159 (2009).
[CrossRef]

Lerosey, G.

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

Li, X. W.

X. W. Li, Q. F. Tan, B. F. Bai, and G. F. Jin, “Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit,” Appl. Phys. Lett. 98(25), 251109 (2011).
[CrossRef]

Li, Z.

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
[CrossRef] [PubMed]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Efficient unidirectional generation of surface plasmon polaritons with an asymmetric single-nanoslit,” Appl. Phys. Lett. 97(4), 041113 (2010).
[CrossRef]

López-Tejeira, F.

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

Luo, X. G.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

Martín-Moreno, L.

I. P. Radko, S. I. Bozhevolnyi, G. Brucoli, L. Martín-Moreno, F. J. García-Vidal, and A. Boltasseva, “Efficient unidirectional ridge excitation of surface plasmons,” Opt. Express 17(9), 7228–7232 (2009).
[CrossRef] [PubMed]

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

Matheu, P.

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

Pile, D. F. P.

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

Polman, A.

E. Verhagen, L. K. Kuipers, and A. Polman, “Plasmonic nanofocusing in a dielectric wedge,” Nano Lett. 10(9), 3665–3669 (2010).
[CrossRef] [PubMed]

Radko, I. P.

I. P. Radko, S. I. Bozhevolnyi, G. Brucoli, L. Martín-Moreno, F. J. García-Vidal, and A. Boltasseva, “Efficient unidirectional ridge excitation of surface plasmons,” Opt. Express 17(9), 7228–7232 (2009).
[CrossRef] [PubMed]

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

Tan, Q. F.

X. W. Li, Q. F. Tan, B. F. Bai, and G. F. Jin, “Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit,” Appl. Phys. Lett. 98(25), 251109 (2011).
[CrossRef]

Verhagen, E.

E. Verhagen, L. K. Kuipers, and A. Polman, “Plasmonic nanofocusing in a dielectric wedge,” Nano Lett. 10(9), 3665–3669 (2010).
[CrossRef] [PubMed]

Wang, B.

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

Wang, C. T.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

Weeber, J. C.

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

Xu, T.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

Yue, S.

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
[CrossRef] [PubMed]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Efficient unidirectional generation of surface plasmon polaritons with an asymmetric single-nanoslit,” Appl. Phys. Lett. 97(4), 041113 (2010).
[CrossRef]

Zhang, X.

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

Zhao, Y. H.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

Appl. Phys. Lett.

T. Xu, Y. H. Zhao, D. C. Gan, C. T. Wang, C. L. Du, and X. G. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92(10), 101501 (2008).
[CrossRef]

X. W. Li, Q. F. Tan, B. F. Bai, and G. F. Jin, “Experimental demonstration of tunable directional excitation of surface plasmon polaritons with a subwavelength metallic double slit,” Appl. Phys. Lett. 98(25), 251109 (2011).
[CrossRef]

B. Wang, L. Aigouy, E. Bourhis, J. Gierak, J. P. Hugonin, and P. Lalanne, “Efficient generation of surface plasmon by single–nanoslit illumination under highly oblique incidence,” Appl. Phys. Lett. 94(1), 011114 (2009).
[CrossRef]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Efficient unidirectional generation of surface plasmon polaritons with an asymmetric single-nanoslit,” Appl. Phys. Lett. 97(4), 041113 (2010).
[CrossRef]

Nano Lett.

E. Verhagen, L. K. Kuipers, and A. Polman, “Plasmonic nanofocusing in a dielectric wedge,” Nano Lett. 10(9), 3665–3669 (2010).
[CrossRef] [PubMed]

G. Lerosey, D. F. P. Pile, P. Matheu, G. Bartal, and X. Zhang, “Controlling the phase and amplitude of plasmon sources at a subwavelength scale,” Nano Lett. 9(1), 327–331 (2009).
[CrossRef] [PubMed]

J. J. Chen, Z. Li, S. Yue, and Q. H. Gong, “Highly efficient all-optical control of surface-plasmon-polariton generation based on a compact asymmetric single slit,” Nano Lett. 11(7), 2933–2937 (2011).
[CrossRef] [PubMed]

Nat. Photonics

D. K. Gramotnev and S. I. Bozhevolnyi, “Plasmonics beyond the diffraction limit,” Nat. Photonics 4(2), 83–91 (2010).
[CrossRef]

Nat. Phys.

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Figures (4)

Fig. 1
Fig. 1

(a) Structure of the asymmetric single nanoslit and the geometrical parameters. (b) SEM image of the experimental structure on the Au film. (c) Detailed image of the central asymmetric single nanoslit (w = 190 nm, d = 140 nm, and LFP = 865 nm).

Fig. 2
Fig. 2

Scattered field distributions for different incident wavelengths of (a) λ = 710 nm, (b) λ = 740 nm, (c) λ = 770 nm, and (d) λ = 810 nm.

Fig. 3
Fig. 3

Experimental and simulation results of SPP generation efficiencies of the PVA–film–coated asymmetric single slit.

Fig. 4
Fig. 4

Dependences of the SPP generation efficiencies to the left (ηL, black line) and to the right (ηR, red dash dot line) on the cavity lengths (LFP) at λ = 750 nm for (a) tPVA = 0 nm and d = 140 nm; (b) tPVA = 160 nm and d = 100 nm; (c) tPVA = 160 nm and d = 140 nm.

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