Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive raman active sites

Kohei Imura, Hiromi Okamoto, Mohammad K. Hossain, Masahiro Kitajima

Research output: Contribution to journalArticle

203 Citations (Scopus)

Abstract

We demonstrate visualization of localized intense electromagnetic fields in real space in well-tailored dimeric and trimeric gold nanospheres by using near-field optical techniques. With two-photon induced luminescence and Raman measurements, we show that the electric field is confined at an interstitial site in the aggregate. We also demonstrate optical switching operations for the electric-field localized sites in the trimer structure.

Original languageEnglish
Pages (from-to)2173-2176
Number of pages4
JournalNano Letters
Volume6
Issue number10
DOIs
Publication statusPublished - 2006 Oct 1

ASJC Scopus subject areas

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

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