Abstract

Nanofocusing properties of a tip in the form of a dielectric tapered fiber with metal apertureless coating and dielectric nanocladding can be tuned within a wide spectral range by choice of cladding permittivity. The silica core of diameter decreasing from 2 μm to 5 nm in apex is covered with a silver layer and has a 5 nm dielectric cladding. Internal illumination with a radially polarized Laguerre-Gauss beam guided in fiber is used. In body-of-revolution finite-difference time-domain simulations we find that with an increase of the refractive index of nanocladdings the maximum enhancement occurs for increasingly longer wavelengths.

© 2009 OSA

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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef] [PubMed]
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    [CrossRef] [PubMed]
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    [CrossRef]
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    [CrossRef]
  12. A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
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    [CrossRef]
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    [CrossRef]
  15. N. A. Issa and R. Guckenberger, “Optical nanofocusing on tapered metallic waveguides,” Plasmonics 2(1), 31–37 (2007).
    [CrossRef]
  16. A. Downes, D. Salter, and A. Elfick, “Simulations of tip-enhanced optical microscopy reveal atomic resolution,” J. Microsc. 229(2), 184–188 (2008).
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    [CrossRef] [PubMed]
  19. F. I. Baida and A. Belkhir, “Superfocusing and light confinement by surface plasmon excitation through radially polarized beam,” Plasmonics 4(1), 51–59 (2009).
    [CrossRef]
  20. S. Quabis, R. Dorn, and G. Leuchs, “Generation of a radially polarized doughnut mode of high quality,” Appl. Phys. B 81(5), 597–600 (2005).
    [CrossRef]
  21. Y. Kozawa, K. Yonezawa, and S. Sato, “Radially polarized laser beam from a Nd:YAG laser cavity with z c-cut YVO4 crystal,” Appl. Phys. B 88(1), 43–46 (2007).
    [CrossRef]
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    [CrossRef]
  25. E. Verhagen, A. Polman, and L. K. Kuipers, “Nanofocusing in laterally tapered plasmonic waveguides,” Opt. Express 16(1), 45–57 (2008), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-1-45 .
    [CrossRef] [PubMed]
  26. T. Grosjean, M. Suarez, and A. Sabac, “Generation of polychromatic radially and azimuthally polarized beams,” Appl. Phys. Lett. 93(23), 231106 (2008).
    [CrossRef]
  27. J. M. Khoshman and M. E. Kordesch, “Optical constants and band edge of amorphous zinc oxide thin films,” Thin Solid Films 515(18), 7393–7399 (2007).
    [CrossRef]

2009 (2)

F. I. Baida and A. Belkhir, “Superfocusing and light confinement by surface plasmon excitation through radially polarized beam,” Plasmonics 4(1), 51–59 (2009).
[CrossRef]

Q. Zhan, “Cylindrical vector beams: from mathematical concepts to applications,” Adv. Opt. Photon. 1(1), 1–57 (2009), http://www.opticsinfobase.org/aop/abstract.cfm?URI=aop-1-1-1 .
[CrossRef]

2008 (6)

E. Verhagen, A. Polman, and L. K. Kuipers, “Nanofocusing in laterally tapered plasmonic waveguides,” Opt. Express 16(1), 45–57 (2008), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-16-1-45 .
[CrossRef] [PubMed]

T. Grosjean, M. Suarez, and A. Sabac, “Generation of polychromatic radially and azimuthally polarized beams,” Appl. Phys. Lett. 93(23), 231106 (2008).
[CrossRef]

A. Downes, D. Salter, and A. Elfick, “Simulations of tip-enhanced optical microscopy reveal atomic resolution,” J. Microsc. 229(2), 184–188 (2008).
[CrossRef] [PubMed]

D. K. Gramotnev, M. W. Vogel, and M. I. Stockman, “Optimized nonadiabatic nanofocusing of plasmons by tapered metal rods,” J. Appl. Phys. 104(3), 034311 (2008).
[CrossRef]

T. J. Antosiewicz and T. Szoplik, “Corrugated SNOM probe with enhanced energy throughput,” Opto-Electron. Rev. 16(4), 451–457 (2008).
[CrossRef]

Y. Wang, W. Srituravanich, C. Sun, and X. Zhang, “Plasmonic nearfield scanning probe with high transmission,” Nano Lett. 8(9), 3041–3045 (2008).
[CrossRef] [PubMed]

2007 (7)

T. J. Antosiewicz and T. Szoplik, “Description of near– and far–field light emitted from a metal–coated tapered fiber tip,” Opt. Express 15(12), 7845–7852 (2007), http://www.opticsinfobase.org/abstract.cfm?URI=oe-15-12-7845 .
[CrossRef] [PubMed]

T. J. Antosiewicz and T. Szoplik, “Corrugated metal–coated tapered tip for scanning near–field optical microscope,” Opt. Express 15(17), 10920–10928 (2007), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-17-10920 .
[CrossRef] [PubMed]

W. Chen and Q. Zhan, “Numerical study of an apertureless near field scanning optical microscope probe under radial polarization illumination,” Opt. Express 15(7), 4106–4111 (2007), http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-15-7-4106 .
[CrossRef] [PubMed]

W. Ding, S. R. Andrews, and S. A. Maier, “Internal excitation and superfocusing of surface plasmon polaritons on a silver–coated optical fiber tip,” Phys. Rev. A 75(6), 063822 (2007).
[CrossRef]

N. A. Issa and R. Guckenberger, “Optical nanofocusing on tapered metallic waveguides,” Plasmonics 2(1), 31–37 (2007).
[CrossRef]

J. M. Khoshman and M. E. Kordesch, “Optical constants and band edge of amorphous zinc oxide thin films,” Thin Solid Films 515(18), 7393–7399 (2007).
[CrossRef]

Y. Kozawa, K. Yonezawa, and S. Sato, “Radially polarized laser beam from a Nd:YAG laser cavity with z c-cut YVO4 crystal,” Appl. Phys. B 88(1), 43–46 (2007).
[CrossRef]

2005 (3)

N. A. Janunts, K. S. Baghdasaryan, K. V. Nerkararyan, and B. Hecht, “Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip,” Opt. Commun. 253(1-3), 118–124 (2005).
[CrossRef]

S. Quabis, R. Dorn, and G. Leuchs, “Generation of a radially polarized doughnut mode of high quality,” Appl. Phys. B 81(5), 597–600 (2005).
[CrossRef]

A. V. Zayats, I. I. Smolyaninov, and A. A. Maradudin, “Nano-optics of surface plasmon polaritons,” Phys. Rep. 408(3-4), 131–314 (2005).
[CrossRef]

2003 (3)

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

W.-X. Sun and Z.-X. Shen, “Optimizing the near field around silver tips,” J. Opt. Soc. Am. A 20(12), 2254–2259 (2003), http://www.opticsinfobase.org/josaa/abstract.cfm?URI=josaa-20-12-2254 .
[CrossRef]

A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
[CrossRef] [PubMed]

2001 (1)

P. Berini, “Plasmon-polariton waves guided by thin lossy metal films of finite width:Bound modes of asymmetric structures,” Phys. Rev. B 63(12), 125417 (2001).
[CrossRef]

2000 (1)

A. J. Babadjanyan, N. L. Margaryan, and Kh. V. Nerkararyana, “Superfocusing of surface polaritons in the conical structure,” J. Appl. Phys. 87(8), 3785–3788 (2000).
[CrossRef]

1995 (1)

1986 (1)

J. J. Burke, G. I. Stegeman, and T. Tamir, “Surface-polariton-like waves guided by thin, lossy metal films,” Phys. Rev. B 33(8), 5186–5201 (1986).
[CrossRef]

1984 (1)

D. W. Pohl, W. Denk, and M. Lanz, “Optical stethoscopy: Image recording with resolution ?/20,” Appl. Phys. Lett. 44(7), 651–653 (1984).
[CrossRef]

Andrews, S. R.

W. Ding, S. R. Andrews, and S. A. Maier, “Internal excitation and superfocusing of surface plasmon polaritons on a silver–coated optical fiber tip,” Phys. Rev. A 75(6), 063822 (2007).
[CrossRef]

Antosiewicz, T. J.

Babadjanyan, A. J.

A. J. Babadjanyan, N. L. Margaryan, and Kh. V. Nerkararyana, “Superfocusing of surface polaritons in the conical structure,” J. Appl. Phys. 87(8), 3785–3788 (2000).
[CrossRef]

Baghdasaryan, K. S.

N. A. Janunts, K. S. Baghdasaryan, K. V. Nerkararyan, and B. Hecht, “Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip,” Opt. Commun. 253(1-3), 118–124 (2005).
[CrossRef]

Baida, F. I.

F. I. Baida and A. Belkhir, “Superfocusing and light confinement by surface plasmon excitation through radially polarized beam,” Plasmonics 4(1), 51–59 (2009).
[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]

Belkhir, A.

F. I. Baida and A. Belkhir, “Superfocusing and light confinement by surface plasmon excitation through radially polarized beam,” Plasmonics 4(1), 51–59 (2009).
[CrossRef]

Berini, P.

P. Berini, “Plasmon-polariton waves guided by thin lossy metal films of finite width:Bound modes of asymmetric structures,” Phys. Rev. B 63(12), 125417 (2001).
[CrossRef]

Beversluis, M. R.

A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
[CrossRef] [PubMed]

Bouhelier, A.

A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
[CrossRef] [PubMed]

Burke, J. J.

J. J. Burke, G. I. Stegeman, and T. Tamir, “Surface-polariton-like waves guided by thin, lossy metal films,” Phys. Rev. B 33(8), 5186–5201 (1986).
[CrossRef]

Chen, W.

Denk, W.

D. W. Pohl, W. Denk, and M. Lanz, “Optical stethoscopy: Image recording with resolution ?/20,” Appl. Phys. Lett. 44(7), 651–653 (1984).
[CrossRef]

Dereux, A.

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

Ding, W.

W. Ding, S. R. Andrews, and S. A. Maier, “Internal excitation and superfocusing of surface plasmon polaritons on a silver–coated optical fiber tip,” Phys. Rev. A 75(6), 063822 (2007).
[CrossRef]

Dorn, R.

S. Quabis, R. Dorn, and G. Leuchs, “Generation of a radially polarized doughnut mode of high quality,” Appl. Phys. B 81(5), 597–600 (2005).
[CrossRef]

Downes, A.

A. Downes, D. Salter, and A. Elfick, “Simulations of tip-enhanced optical microscopy reveal atomic resolution,” J. Microsc. 229(2), 184–188 (2008).
[CrossRef] [PubMed]

Ebbesen, T. W.

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

Elfick, A.

A. Downes, D. Salter, and A. Elfick, “Simulations of tip-enhanced optical microscopy reveal atomic resolution,” J. Microsc. 229(2), 184–188 (2008).
[CrossRef] [PubMed]

Gramotnev, D. K.

D. K. Gramotnev, M. W. Vogel, and M. I. Stockman, “Optimized nonadiabatic nanofocusing of plasmons by tapered metal rods,” J. Appl. Phys. 104(3), 034311 (2008).
[CrossRef]

Grosjean, T.

T. Grosjean, M. Suarez, and A. Sabac, “Generation of polychromatic radially and azimuthally polarized beams,” Appl. Phys. Lett. 93(23), 231106 (2008).
[CrossRef]

Guckenberger, R.

N. A. Issa and R. Guckenberger, “Optical nanofocusing on tapered metallic waveguides,” Plasmonics 2(1), 31–37 (2007).
[CrossRef]

Hecht, B.

N. A. Janunts, K. S. Baghdasaryan, K. V. Nerkararyan, and B. Hecht, “Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip,” Opt. Commun. 253(1-3), 118–124 (2005).
[CrossRef]

L. Novotny, D. W. Pohl, and B. Hecht, “Scanning near-field optical probe with ultrasmall spot size,” Opt. Lett. 20(9), 970–972 (1995), http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-9-970 .
[CrossRef] [PubMed]

Issa, N. A.

N. A. Issa and R. Guckenberger, “Optical nanofocusing on tapered metallic waveguides,” Plasmonics 2(1), 31–37 (2007).
[CrossRef]

Janunts, N. A.

N. A. Janunts, K. S. Baghdasaryan, K. V. Nerkararyan, and B. Hecht, “Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip,” Opt. Commun. 253(1-3), 118–124 (2005).
[CrossRef]

Khoshman, J. M.

J. M. Khoshman and M. E. Kordesch, “Optical constants and band edge of amorphous zinc oxide thin films,” Thin Solid Films 515(18), 7393–7399 (2007).
[CrossRef]

Kordesch, M. E.

J. M. Khoshman and M. E. Kordesch, “Optical constants and band edge of amorphous zinc oxide thin films,” Thin Solid Films 515(18), 7393–7399 (2007).
[CrossRef]

Kozawa, Y.

Y. Kozawa, K. Yonezawa, and S. Sato, “Radially polarized laser beam from a Nd:YAG laser cavity with z c-cut YVO4 crystal,” Appl. Phys. B 88(1), 43–46 (2007).
[CrossRef]

Kuipers, L. K.

Lanz, M.

D. W. Pohl, W. Denk, and M. Lanz, “Optical stethoscopy: Image recording with resolution ?/20,” Appl. Phys. Lett. 44(7), 651–653 (1984).
[CrossRef]

Leuchs, G.

S. Quabis, R. Dorn, and G. Leuchs, “Generation of a radially polarized doughnut mode of high quality,” Appl. Phys. B 81(5), 597–600 (2005).
[CrossRef]

Maier, S. A.

W. Ding, S. R. Andrews, and S. A. Maier, “Internal excitation and superfocusing of surface plasmon polaritons on a silver–coated optical fiber tip,” Phys. Rev. A 75(6), 063822 (2007).
[CrossRef]

Maradudin, A. A.

A. V. Zayats, I. I. Smolyaninov, and A. A. Maradudin, “Nano-optics of surface plasmon polaritons,” Phys. Rep. 408(3-4), 131–314 (2005).
[CrossRef]

Margaryan, N. L.

A. J. Babadjanyan, N. L. Margaryan, and Kh. V. Nerkararyana, “Superfocusing of surface polaritons in the conical structure,” J. Appl. Phys. 87(8), 3785–3788 (2000).
[CrossRef]

Nerkararyan, K. V.

N. A. Janunts, K. S. Baghdasaryan, K. V. Nerkararyan, and B. Hecht, “Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip,” Opt. Commun. 253(1-3), 118–124 (2005).
[CrossRef]

Nerkararyana, Kh. V.

A. J. Babadjanyan, N. L. Margaryan, and Kh. V. Nerkararyana, “Superfocusing of surface polaritons in the conical structure,” J. Appl. Phys. 87(8), 3785–3788 (2000).
[CrossRef]

Novotny, L.

A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
[CrossRef] [PubMed]

L. Novotny, D. W. Pohl, and B. Hecht, “Scanning near-field optical probe with ultrasmall spot size,” Opt. Lett. 20(9), 970–972 (1995), http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-20-9-970 .
[CrossRef] [PubMed]

Pohl, D. W.

Polman, A.

Quabis, S.

S. Quabis, R. Dorn, and G. Leuchs, “Generation of a radially polarized doughnut mode of high quality,” Appl. Phys. B 81(5), 597–600 (2005).
[CrossRef]

Renger, J.

A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
[CrossRef] [PubMed]

Sabac, A.

T. Grosjean, M. Suarez, and A. Sabac, “Generation of polychromatic radially and azimuthally polarized beams,” Appl. Phys. Lett. 93(23), 231106 (2008).
[CrossRef]

Salter, D.

A. Downes, D. Salter, and A. Elfick, “Simulations of tip-enhanced optical microscopy reveal atomic resolution,” J. Microsc. 229(2), 184–188 (2008).
[CrossRef] [PubMed]

Sato, S.

Y. Kozawa, K. Yonezawa, and S. Sato, “Radially polarized laser beam from a Nd:YAG laser cavity with z c-cut YVO4 crystal,” Appl. Phys. B 88(1), 43–46 (2007).
[CrossRef]

Shen, Z.-X.

Smolyaninov, I. I.

A. V. Zayats, I. I. Smolyaninov, and A. A. Maradudin, “Nano-optics of surface plasmon polaritons,” Phys. Rep. 408(3-4), 131–314 (2005).
[CrossRef]

Srituravanich, W.

Y. Wang, W. Srituravanich, C. Sun, and X. Zhang, “Plasmonic nearfield scanning probe with high transmission,” Nano Lett. 8(9), 3041–3045 (2008).
[CrossRef] [PubMed]

Stegeman, G. I.

J. J. Burke, G. I. Stegeman, and T. Tamir, “Surface-polariton-like waves guided by thin, lossy metal films,” Phys. Rev. B 33(8), 5186–5201 (1986).
[CrossRef]

Stockman, M. I.

D. K. Gramotnev, M. W. Vogel, and M. I. Stockman, “Optimized nonadiabatic nanofocusing of plasmons by tapered metal rods,” J. Appl. Phys. 104(3), 034311 (2008).
[CrossRef]

Suarez, M.

T. Grosjean, M. Suarez, and A. Sabac, “Generation of polychromatic radially and azimuthally polarized beams,” Appl. Phys. Lett. 93(23), 231106 (2008).
[CrossRef]

Sun, C.

Y. Wang, W. Srituravanich, C. Sun, and X. Zhang, “Plasmonic nearfield scanning probe with high transmission,” Nano Lett. 8(9), 3041–3045 (2008).
[CrossRef] [PubMed]

Sun, W.-X.

Szoplik, T.

Tamir, T.

J. J. Burke, G. I. Stegeman, and T. Tamir, “Surface-polariton-like waves guided by thin, lossy metal films,” Phys. Rev. B 33(8), 5186–5201 (1986).
[CrossRef]

Verhagen, E.

Vogel, M. W.

D. K. Gramotnev, M. W. Vogel, and M. I. Stockman, “Optimized nonadiabatic nanofocusing of plasmons by tapered metal rods,” J. Appl. Phys. 104(3), 034311 (2008).
[CrossRef]

Wang, Y.

Y. Wang, W. Srituravanich, C. Sun, and X. Zhang, “Plasmonic nearfield scanning probe with high transmission,” Nano Lett. 8(9), 3041–3045 (2008).
[CrossRef] [PubMed]

Yonezawa, K.

Y. Kozawa, K. Yonezawa, and S. Sato, “Radially polarized laser beam from a Nd:YAG laser cavity with z c-cut YVO4 crystal,” Appl. Phys. B 88(1), 43–46 (2007).
[CrossRef]

Zayats, A. V.

A. V. Zayats, I. I. Smolyaninov, and A. A. Maradudin, “Nano-optics of surface plasmon polaritons,” Phys. Rep. 408(3-4), 131–314 (2005).
[CrossRef]

Zhan, Q.

Zhang, X.

Y. Wang, W. Srituravanich, C. Sun, and X. Zhang, “Plasmonic nearfield scanning probe with high transmission,” Nano Lett. 8(9), 3041–3045 (2008).
[CrossRef] [PubMed]

Adv. Opt. Photon. (1)

Appl. Phys. B (2)

S. Quabis, R. Dorn, and G. Leuchs, “Generation of a radially polarized doughnut mode of high quality,” Appl. Phys. B 81(5), 597–600 (2005).
[CrossRef]

Y. Kozawa, K. Yonezawa, and S. Sato, “Radially polarized laser beam from a Nd:YAG laser cavity with z c-cut YVO4 crystal,” Appl. Phys. B 88(1), 43–46 (2007).
[CrossRef]

Appl. Phys. Lett. (2)

T. Grosjean, M. Suarez, and A. Sabac, “Generation of polychromatic radially and azimuthally polarized beams,” Appl. Phys. Lett. 93(23), 231106 (2008).
[CrossRef]

D. W. Pohl, W. Denk, and M. Lanz, “Optical stethoscopy: Image recording with resolution ?/20,” Appl. Phys. Lett. 44(7), 651–653 (1984).
[CrossRef]

J. Appl. Phys. (2)

A. J. Babadjanyan, N. L. Margaryan, and Kh. V. Nerkararyana, “Superfocusing of surface polaritons in the conical structure,” J. Appl. Phys. 87(8), 3785–3788 (2000).
[CrossRef]

D. K. Gramotnev, M. W. Vogel, and M. I. Stockman, “Optimized nonadiabatic nanofocusing of plasmons by tapered metal rods,” J. Appl. Phys. 104(3), 034311 (2008).
[CrossRef]

J. Microsc. (2)

A. Bouhelier, J. Renger, M. R. Beversluis, and L. Novotny, “Plasmon-coupled tip-enhanced near-field optical microscopy,” J. Microsc. 210(3), 220–224 (2003).
[CrossRef] [PubMed]

A. Downes, D. Salter, and A. Elfick, “Simulations of tip-enhanced optical microscopy reveal atomic resolution,” J. Microsc. 229(2), 184–188 (2008).
[CrossRef] [PubMed]

J. Opt. Soc. Am. A (1)

Nano Lett. (1)

Y. Wang, W. Srituravanich, C. Sun, and X. Zhang, “Plasmonic nearfield scanning probe with high transmission,” Nano Lett. 8(9), 3041–3045 (2008).
[CrossRef] [PubMed]

Nature (1)

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

Opt. Commun. (1)

N. A. Janunts, K. S. Baghdasaryan, K. V. Nerkararyan, and B. Hecht, “Excitation and superfocusing of surface plasmon polaritons on a silver-coated optical fiber tip,” Opt. Commun. 253(1-3), 118–124 (2005).
[CrossRef]

Opt. Express (4)

Opt. Lett. (1)

Opto-Electron. Rev. (1)

T. J. Antosiewicz and T. Szoplik, “Corrugated SNOM probe with enhanced energy throughput,” Opto-Electron. Rev. 16(4), 451–457 (2008).
[CrossRef]

Phys. Rep. (1)

A. V. Zayats, I. I. Smolyaninov, and A. A. Maradudin, “Nano-optics of surface plasmon polaritons,” Phys. Rep. 408(3-4), 131–314 (2005).
[CrossRef]

Phys. Rev. A (1)

W. Ding, S. R. Andrews, and S. A. Maier, “Internal excitation and superfocusing of surface plasmon polaritons on a silver–coated optical fiber tip,” Phys. Rev. A 75(6), 063822 (2007).
[CrossRef]

Phys. Rev. B (2)

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[CrossRef]

P. Berini, “Plasmon-polariton waves guided by thin lossy metal films of finite width:Bound modes of asymmetric structures,” Phys. Rev. B 63(12), 125417 (2001).
[CrossRef]

Plasmonics (2)

N. A. Issa and R. Guckenberger, “Optical nanofocusing on tapered metallic waveguides,” Plasmonics 2(1), 31–37 (2007).
[CrossRef]

F. I. Baida and A. Belkhir, “Superfocusing and light confinement by surface plasmon excitation through radially polarized beam,” Plasmonics 4(1), 51–59 (2009).
[CrossRef]

Thin Solid Films (1)

J. M. Khoshman and M. E. Kordesch, “Optical constants and band edge of amorphous zinc oxide thin films,” Thin Solid Films 515(18), 7393–7399 (2007).
[CrossRef]

Other (1)

L. Novotny, and B. Hecht, Principles of Nano-Optics (Cambridge, Cambridge, 2007).

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Figures (4)

Fig. 1
Fig. 1

Scheme of the analyzed apertureless SNOM probe. The probe layers from the axis are: dielectric core in dark blue, silver cladding in light gray, outer dielectric coating in light blue. The cladding of the fiber is not shown. The input beam is a radially polarized Laguerre-Gauss beam and is defined by R – radius of maximum intensity.

Fig. 2
Fig. 2

Intensity enhancement at the apex of a DMD probe tapered at 20° half-angle with silver thickness d = 40 nm: (a) intensity enhancement normalized to the maximum intensity of incident light and (b) to intensity enhancement achievable without cladding.

Fig. 3
Fig. 3

Intensity enhancement at the apex of DMD probes for silver coating thicknesses d changing from 20 to 60 nm for nanocladding permittivities ε (a) 1.44, (b) 2.25, (c) 3.24.

Fig. 4
Fig. 4

Electric energy density |E|2 distributions for (a) a silver coated probe without cladding at wavelength λ = 420 nm, (b) probe with nanocladding ε = 2.89 at λ = 570 nm, and (c) probe with nanocladding ε = 3.24 at λ = 600 nm. The energy density scale is logarithmic, the maximum electric energy density for an incident wave is shown with a white line at 100. FWHM of electric field is calculated 3 nm from the apex.

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