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Optics Express

Optics Express

  • Editor: Michael Duncan
  • Vol. 14, Iss. 23 — Nov. 13, 2006
  • pp: 11339–11347

Surface plasmon-like modes on structured perfectly conducting surfaces

Yung-Chiang Lan and Ruey-Lin Chern  »View Author Affiliations

Optics Express, Vol. 14, Issue 23, pp. 11339-11347 (2006)

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Surface plasmon-like (SPL) modes are the electromagnetic surface eigenmodes supported by the structured perfectly conducting surfaces. The standard eigenvalue-solving method is adopted to solve these SPL modes. The field patterns of the SPL modes in the square holes for inplane wavevectors kx =2π/2d and kx =2π/d are TE10-like and TE11, respectively. However, the field patterns can no longer be identified as any particular waveguide mode for other in-plane wavevectors. The dispersion relations of the SPL modes are obtained numerically. The change in mode character with wavevector prevents the dispersion relation from being derived by assuming only the fundamental mode in the holes. On a thin perfect conductor perforated with structures, the SPL mode splits into a high-frequency anti-symmetric mode and a low-frequency symmetric mode, which is caused by the mutual interaction of the electromagnetic evanescent fields on both sides.

© 2006 Optical Society of America

OCIS Codes
(240.6680) Optics at surfaces : Surface plasmons
(240.6690) Optics at surfaces : Surface waves

ToC Category:
Optics at Surfaces

Original Manuscript: September 5, 2006
Revised Manuscript: October 28, 2006
Manuscript Accepted: October 30, 2006
Published: November 13, 2006

Yung-Chiang Lan and Ruey-Lin Chern, "Surface plasmon-like modes on structured perfectly conducting surfaces," Opt. Express 14, 11339-11347 (2006)

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