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

Hanwei Gao, Joel Henzie, Teri W. Odom

Research output: Contribution to journalArticle

224 Citations (Scopus)

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
Pages (from-to)2104-2108
Number of pages5
JournalNano letters
Volume6
Issue number9
DOIs
Publication statusPublished - Sep 1 2006

ASJC Scopus subject areas

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

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