Direct evidence for surface plasmon-mediated enhanced light transmission through metallic nanohole arrays

Hanwei Gao, Joel Henzie, Teri W. Odom*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

227 Scopus citations

Abstract

This paper provides direct evidence for the role of surface plasmons in the enhanced optical transmission of light through metallic nanoscale hole arrays. Near-field optical images directly confirmed the presence of surface plasmons on gold nanohole arrays with interhole spacings larger than the surface plasmon wavelength. A simple interference model provides an intuitive explanation of the two types of fringe wavelengths observed in the near-field optical images. Far-field spectroscopy revealed a surface plasmon band that contributed a factor >8 to the transmission enhancement. Furthermore, silicon nanohole arrays did not exhibit any features in the near-field, which demonstrates that metallic materials are necessary for enhanced light transmission through nanohole arrays.

Original languageEnglish (US)
Pages (from-to)2104-2108
Number of pages5
JournalNano letters
Volume6
Issue number9
DOIs
StatePublished - Sep 1 2006

ASJC Scopus subject areas

  • Bioengineering
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanical Engineering

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