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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 15, Iss. 10 — May. 14, 2007
  • pp: 6380–6388

Resonant tunneling of surface plasmon-polaritons

Sergei Sidorenko and Olivier J. F. Martin  »View Author Affiliations

Optics Express, Vol. 15, Issue 10, pp. 6380-6388 (2007)

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The tunneling of surface plasmon-polaritons (SPPs) across an interruption in the metallic film supporting them is numerically investigated in details. Both non-symmetrical and symmetrical geometries are considered. A very high tunneling efficiency is calculated for the long-range surface plasmon in the symmetrical geometry, with an amplitude transmission as high as 80% over a 5 μm gap for a 40 nm thick gold film illuminated at λ=785nm. The transmission is somewhat lower in the non-symmetrical geometry. The coupling between the different SPP modes (radiative and non-radiative) in that geometry is also investigated in detail. This coupling depends periodically upon the length of the gap. Overall, the results indicate that SPPs are not very sensitive to technological imperfections and can survive large waveguide interruptions.

© 2007 Optical Society of America

OCIS Codes
(000.4430) General : Numerical approximation and analysis
(230.7370) Optical devices : Waveguides
(240.6680) Optics at surfaces : Surface plasmons
(240.7040) Optics at surfaces : Tunneling
(290.0290) Scattering : Scattering

ToC Category:
Optics at Surfaces

Original Manuscript: April 6, 2007
Revised Manuscript: May 7, 2007
Manuscript Accepted: May 7, 2007
Published: May 8, 2007

Sergei Sidorenko and Olivier J. F. Martin, "Resonant tunneling of surface plasmon-polaritons," Opt. Express 15, 6380-6388 (2007)

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