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

199 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
Externally publishedYes

Fingerprint

Gold
assemblies
Visualization
Electric fields
gold
Nanoparticles
nanoparticles
electric fields
Nanospheres
optical switching
trimers
Electromagnetic fields
Luminescence
near fields
interstitials
electromagnetic fields
Photons
luminescence
photons

ASJC Scopus subject areas

  • Materials Science(all)
  • Electronic, Optical and Magnetic Materials
  • Chemistry (miscellaneous)

Cite this

Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive raman active sites. / Imura, Kohei; Okamoto, Hiromi; Hossain, Mohammad K.; Kitajima, Masahiro.

In: Nano Letters, Vol. 6, No. 10, 10.2006, p. 2173-2176.

Research output: Contribution to journalArticle

Imura, Kohei ; Okamoto, Hiromi ; Hossain, Mohammad K. ; Kitajima, Masahiro. / Visualization of localized intense optical fields in single gold-nanoparticle assemblies and ultrasensitive raman active sites. In: Nano Letters. 2006 ; Vol. 6, No. 10. pp. 2173-2176.
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