Abstract

A nanometeric plasmonic nanonotch structure with a dielectric core is proposed and demonstrated numerically by using the finite difference time-domain (FDTD) method. An analytic model based on resonance theory is given. The result reveals that the nanonotch structure can realize a narrow-band wavelength-filtering function. The wavelengths of dips are proportional to the length of the nanonotch and are inverse proportional-like to its width. The effect of the rounded corners at the crossing section on the transmission characteristics is also explored. The plasmonic nanonotch structure has an ultracompact size in the length of a few hundred nanometers. Our results may open a way to construct nanoscale high-density photonic integration circuits and biochemical sensors.

© 2010 Optical Society of America

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References

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  1. S. I. Bozhevolnyi, V. S. Volkov, E. Devaux, J.-Y. Laluet, and T. W. Ebbesen, “Channel plasmon subwavelength waveguide component including interferometers and ring resonators,” Nature 440, 508–511 (2006).
    [CrossRef] [PubMed]
  2. I. I. Smolyaninor, Y. J. Hung, and C. C. Davis, “Surface plasmon dielectric waveguides,” Appl. Phys. Lett. 87, 241106 (2005).
    [CrossRef]
  3. H. Raether, Surface Plasmons on Smooth and Rough Surfaces and on Gratings (Springer-Verlag, 1988).
  4. T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
    [CrossRef]
  5. T. Xu, Y. Zhao, D. Gan, C. Wang, C. Du, and X. Luo, “Directional excitation of surface plasmons with subwavelength slits,” Appl. Phys. Lett. 92, 101501 (2008).
    [CrossRef]
  6. 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, 152–156 (2009).
    [CrossRef]
  7. A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
    [CrossRef]
  8. E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
    [CrossRef] [PubMed]
  9. Q. Zhang, X.-G. Huang, X.-S. Lin, J. Tao, and X.-P. Jin, “A subwavelength coupler-type MIM optical filter,” Opt. Express 17, 7549–7555 (2009).
    [CrossRef]
  10. R. B. Nielsen, I. Fernandez-Cuesta, A. Boltasseva, V. S. Volkov, S. I. Bozhevolnyi, A. Klukowska, and A. Kristensen, “Channel plasmon polariton propagation in nanoimprinted V-groove waveguides,” Opt. Lett. 33, 2800–2802 (2008).
    [CrossRef] [PubMed]
  11. I. Breukelaar and P. Berini, “Long-range surface plasmon polariton mode cutoff and radiation in slab waveguides,” J. Opt. Soc. Am. A 23, 1971–1977 (2006).
    [CrossRef]
  12. A. Boltasseva, S. I. Bozhevolnyi, T. Nikolajsen, and K. Leosson, “Compact Bragg gratings for long-range surface plasmon polaritons,” J. Lightwave Technol. 24, 912–918 (2006).
    [CrossRef]
  13. J. A. Dionne, L. A. Sweatlock, and H. A. Atwater, “Plasmon slot waveguides: towards chip-scale propagation with subwavelength-scale localization,” Phys. Rev. B 73, 035407 (2006).
    [CrossRef]
  14. T.-W. Leeand S. K. Gray, “Subwavelength light bending by metal slit structures,” Opt. Express 13, 9650–9659 (2005).
  15. P. B. Johnson and R. W. Christy, “Optical constants of the noble metals,” Phys. Rev. B 6, 4370–4379 (1972).
    [CrossRef]
  16. G. Veronis and S. Fan, “Bends and splitters in metal–dielectric–metal subwavelength plasmonic waveguides,” Appl. Phys. Lett. 87, 131102 (2005).
    [CrossRef]

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, 152–156 (2009).
[CrossRef]

Q. Zhang, X.-G. Huang, X.-S. Lin, J. Tao, and X.-P. Jin, “A subwavelength coupler-type MIM optical filter,” Opt. Express 17, 7549–7555 (2009).
[CrossRef]

2008

R. B. Nielsen, I. Fernandez-Cuesta, A. Boltasseva, V. S. Volkov, S. I. Bozhevolnyi, A. Klukowska, and A. Kristensen, “Channel plasmon polariton propagation in nanoimprinted V-groove waveguides,” Opt. Lett. 33, 2800–2802 (2008).
[CrossRef] [PubMed]

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

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

2006

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

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

J. A. Dionne, L. A. Sweatlock, and H. A. Atwater, “Plasmon slot waveguides: towards chip-scale propagation with subwavelength-scale localization,” Phys. Rev. B 73, 035407 (2006).
[CrossRef]

A. Boltasseva, S. I. Bozhevolnyi, T. Nikolajsen, and K. Leosson, “Compact Bragg gratings for long-range surface plasmon polaritons,” J. Lightwave Technol. 24, 912–918 (2006).
[CrossRef]

I. Breukelaar and P. Berini, “Long-range surface plasmon polariton mode cutoff and radiation in slab waveguides,” J. Opt. Soc. Am. A 23, 1971–1977 (2006).
[CrossRef]

2005

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

G. Veronis and S. Fan, “Bends and splitters in metal–dielectric–metal subwavelength plasmonic waveguides,” Appl. Phys. Lett. 87, 131102 (2005).
[CrossRef]

T.-W. Leeand S. K. Gray, “Subwavelength light bending by metal slit structures,” Opt. Express 13, 9650–9659 (2005).

I. I. Smolyaninor, Y. J. Hung, and C. C. Davis, “Surface plasmon dielectric waveguides,” Appl. Phys. Lett. 87, 241106 (2005).
[CrossRef]

1972

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

Atwater, H. A.

J. A. Dionne, L. A. Sweatlock, and H. A. Atwater, “Plasmon slot waveguides: towards chip-scale propagation with subwavelength-scale localization,” Phys. Rev. B 73, 035407 (2006).
[CrossRef]

Bachelot, R.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Barnes, W. L.

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

Berini, P.

Boltasseva, A.

Bouhelier, A.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Bozhevolnyi, S. I.

Breukelaar, I.

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, 152–156 (2009).
[CrossRef]

Christy, R. W.

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

Davis, C. C.

I. I. Smolyaninor, Y. J. Hung, and C. C. Davis, “Surface plasmon dielectric waveguides,” Appl. Phys. Lett. 87, 241106 (2005).
[CrossRef]

Devaux, E.

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

Dionne, J. A.

J. A. Dionne, L. A. Sweatlock, and H. A. Atwater, “Plasmon slot waveguides: towards chip-scale propagation with subwavelength-scale localization,” Phys. Rev. B 73, 035407 (2006).
[CrossRef]

Du, C.

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

Ebbesen, T. W.

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

Fan, S.

G. Veronis and S. Fan, “Bends and splitters in metal–dielectric–metal subwavelength plasmonic waveguides,” Appl. Phys. Lett. 87, 131102 (2005).
[CrossRef]

Fernandez-Cuesta, I.

Gan, D.

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

Gray, S. K.

T.-W. Leeand S. K. Gray, “Subwavelength light bending by metal slit structures,” Opt. Express 13, 9650–9659 (2005).

Hendry, E.

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

Huang, X.-G.

Hung, Y. J.

I. I. Smolyaninor, Y. J. Hung, and C. C. Davis, “Surface plasmon dielectric waveguides,” Appl. Phys. Lett. 87, 241106 (2005).
[CrossRef]

Isaac, T. H.

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

Jin, X.-P.

Johnson, P. B.

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

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, 152–156 (2009).
[CrossRef]

Kim, D. 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, 152–156 (2009).
[CrossRef]

Klukowska, A.

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, 152–156 (2009).
[CrossRef]

Kostcheev, S.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Kristensen, A.

Laluet, J.-Y.

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

Lee, T.-W.

T.-W. Leeand S. K. Gray, “Subwavelength light bending by metal slit structures,” Opt. Express 13, 9650–9659 (2005).

Leosson, K.

Lerondel, G.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Lin, X.-S.

Luo, X.

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

Mirkin, C. A.

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

Nielsen, R. B.

Nikolajsen, T.

Park, D. J.

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, 152–156 (2009).
[CrossRef]

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, 152–156 (2009).
[CrossRef]

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, 152–156 (2009).
[CrossRef]

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, 152–156 (2009).
[CrossRef]

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, 152–156 (2009).
[CrossRef]

Park, S.

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

Payne, E. K.

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

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, 152–156 (2009).
[CrossRef]

Raether, H.

H. Raether, Surface Plasmons on Smooth and Rough Surfaces and on Gratings (Springer-Verlag, 1988).

Rivas, J. Gómez

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

Royer, P.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Sambles, J. R.

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

Schatz, G. C.

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

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, 152–156 (2009).
[CrossRef]

Shuford, K. L.

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

Smolyaninor, I. I.

I. I. Smolyaninor, Y. J. Hung, and C. C. Davis, “Surface plasmon dielectric waveguides,” Appl. Phys. Lett. 87, 241106 (2005).
[CrossRef]

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, 152–156 (2009).
[CrossRef]

Sweatlock, L. A.

J. A. Dionne, L. A. Sweatlock, and H. A. Atwater, “Plasmon slot waveguides: towards chip-scale propagation with subwavelength-scale localization,” Phys. Rev. B 73, 035407 (2006).
[CrossRef]

Tao, J.

Veronis, G.

G. Veronis and S. Fan, “Bends and splitters in metal–dielectric–metal subwavelength plasmonic waveguides,” Appl. Phys. Lett. 87, 131102 (2005).
[CrossRef]

Volkov, V. S.

R. B. Nielsen, I. Fernandez-Cuesta, A. Boltasseva, V. S. Volkov, S. I. Bozhevolnyi, A. Klukowska, and A. Kristensen, “Channel plasmon polariton propagation in nanoimprinted V-groove waveguides,” Opt. Lett. 33, 2800–2802 (2008).
[CrossRef] [PubMed]

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

Wang, C.

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

Wiederrecht, G. P.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Xu, T.

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

Zhang, Q.

Zhao, Y.

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

Appl. Phys. Lett.

I. I. Smolyaninor, Y. J. Hung, and C. C. Davis, “Surface plasmon dielectric waveguides,” Appl. Phys. Lett. 87, 241106 (2005).
[CrossRef]

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

G. Veronis and S. Fan, “Bends and splitters in metal–dielectric–metal subwavelength plasmonic waveguides,” Appl. Phys. Lett. 87, 131102 (2005).
[CrossRef]

J. Lightwave Technol.

J. Opt. Soc. Am. A

J. Phys. Chem. B

E. K. Payne, K. L. Shuford, S. Park, G. C. Schatz, and C. A. Mirkin, “Multipole plasmon resonances in gold nanorods,” J. Phys. Chem. B 110, 2150–2154 (2006).
[CrossRef] [PubMed]

Nat. Photonics

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, 152–156 (2009).
[CrossRef]

Nature

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

Opt. Express

T.-W. Leeand S. K. Gray, “Subwavelength light bending by metal slit structures,” Opt. Express 13, 9650–9659 (2005).

Q. Zhang, X.-G. Huang, X.-S. Lin, J. Tao, and X.-P. Jin, “A subwavelength coupler-type MIM optical filter,” Opt. Express 17, 7549–7555 (2009).
[CrossRef]

Opt. Lett.

Phys. Rev. B

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

T. H. Isaac, J. Gómez Rivas, J. R. Sambles, W. L. Barnes, and E. Hendry, “Surface plasmon mediated transmission of subwavelength slits at THz frequencies,” Phys. Rev. B 77, 113411 (2008).
[CrossRef]

J. A. Dionne, L. A. Sweatlock, and H. A. Atwater, “Plasmon slot waveguides: towards chip-scale propagation with subwavelength-scale localization,” Phys. Rev. B 73, 035407 (2006).
[CrossRef]

Phys. Rev. Lett.

A. Bouhelier, R. Bachelot, G. Lerondel, S. Kostcheev, P. Royer, and G. P. Wiederrecht, “Surface plasmon characteristics of tunable photoluminescence in single gold nanorods,” Phys. Rev. Lett. 95, 267405 (2005).
[CrossRef]

Other

H. Raether, Surface Plasmons on Smooth and Rough Surfaces and on Gratings (Springer-Verlag, 1988).

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Figures (7)

Fig. 1
Fig. 1

Dependence of real part of the effective index of SPPs in 2D plasmonic nanonotch on the width w at various wavelengths of the incident light. Inset: (a) schematic picture of a nanonotch. (b) Spatial extent of SPP waves.

Fig. 2
Fig. 2

(a) Schematic of a typical nanonotch structure. (b) The transmittance and reflectance of a nanonotch structure with w = 250 nm , w = 15 nm , and L = 250 nm .

Fig. 3
Fig. 3

(a) Transmission spectra of the nanonotch structure with different nanonotch lengths for a given nanonotch width of w = 15 nm and separation of w = 250 nm between upper and lower silver plates. (b) Wavelength of the dip versus the nanonotch length of L with w = 10 nm and w = 15 nm .

Fig. 4
Fig. 4

(a) Transmission spectra of the nanonotch structure with different nanonotch width of w for a fixed nanonotch length of L = 425 nm and a separation of w = 250 nm between upper and lower silver plates. (b) Wavelength of the second dip versus the nanonotch width of w.

Fig. 5
Fig. 5

The dependence of transmission on the separation w .

Fig. 6
Fig. 6

The dependence of quality factor on the width of the nanonotch structure with a given nanonotch length of L = 425 nm and separation of w = 250 nm between upper and lower silver plates.

Fig. 7
Fig. 7

Transmission spectra of the nanonotch structure with width of w = 15 nm , length of L = 425 nm , and separation of w = 250 nm between upper and lower silver plates. Dashed black and solid red curves represent sharp corners and round corners, respectively.

Equations (4)

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ϵ d k z 2 + ϵ m k z 1 coth ( i k z 1 2 w ) = 0.
ϵ m ( ω ) = ϵ ω D 2 ω 2 + i γ D ω m = 1 2 g L m ω L m 2 Δ ϵ ω 2 ω L m 2 + i 2 γ L m ω .
Δ ϕ = m 2 π .
λ m = 2 n eff L m ( ϕ 1 + ϕ 2 ) π .

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