Surface plasmon-like modes on structured perfectly conducting surfaces

Yung Chiang Lan, Ruey Lin Chern

Research output: Contribution to journalArticlepeer-review

23 Citations (Scopus)

Abstract

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 k x = 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.

Original languageEnglish
Pages (from-to)11339-11347
Number of pages9
JournalOptics Express
Volume14
Issue number23
DOIs
Publication statusPublished - 2006 Nov

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics

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