Optical transmission through single subwavelength apertures using prism coupled input of laser light of annular intensity profile

Lei Feng, Paul Dawson

Research output: Contribution to journalArticlepeer-review

3 Citations (Scopus)

Abstract

Light transmission through a single subwavelength aperture in a silver film is examined with a novel input configuration comprising an annular laser beam of variable diameter that is prism-coupled to the back face of the silver. Transmission peaks driven by excitation of the back-face surface plasmon mode or by the aperture resonance itself are separately observed. For both cases, comparison of films with and without a front-face, circular grating implies significantly more efficient coupling from the aperture fields to the front-face surface plasmon than directly to free radiation. (c) 2007 Optical Society of America.
Original languageEnglish
Pages (from-to)17863-17873
Number of pages11
JournalOptics Express
Volume15
Issue number26
Publication statusPublished - 24 Dec 2007

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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