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Role of local surface plasmon modes in the extraordinary optical transmission of sub-wavelength apertures

  • Chaonan Wang*
  • , Ming Bae
  • *Corresponding author for this work
  • Beihang University

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

The extraordinary optical transmission through single sub-wavelength apertures is investigated in this paper. SPP modes on the upper and lower in-plane surfaces and Local Surface Plasmon (LSP) modes propagating along the vertical hole wall are clearly distinguished. We have numerically studied the procedure of wave propagating through a single sub-wavelength hole with a 3D finite-difference time-domain (FDTD) method and traced the wave vectors during the enhanced transmission using full wave analysis. It shows clear evidence that the LSP modes propagating along the hole wall is the origin of the extraordinary optical transmission of single sub-wavelength apertures, as a strong support to the previous experimental results. The role of these modes is identified by comparison of transmission properties of the sandwich-like structures made of different metallic materials. Transmission at inclined incidence for p-polarization and s-polarization are also calculated and the results can be properly explained with our view.

Original languageEnglish
Title of host publication2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010
Pages1085-1088
Number of pages4
DOIs
StatePublished - 2010
Event2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010 - Guangzhou, China
Duration: 29 Nov 20102 Dec 2010

Publication series

Name2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010

Conference

Conference2010 9th International Symposium on Antennas Propagation and EM Theory, ISAPE 2010
Country/TerritoryChina
CityGuangzhou
Period29/11/102/12/10

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