Raman activity and dynamics of plasmons on a rough gold film studied by ultrafast scanning near-field optical microscopy

Keisuke Imaeda, Kohei Imura

研究成果: Chapter

抄録

We investigated the surface-enhanced Raman scattering activity and spatio-temporal characteristics of plasmons excited on a rough gold film using ultrafast near-field optical microscopy. Near-field nonlinear excitation images showed a number of optically amplified spots on the sample surface. Raman scattering from molecules dispersed on the sample was enhanced at the amplified fields in a space-selective manner. Time-resolved near-field measurements revealed that the dephasing time varies depending on the excited plasmon. We evaluated the resonant mode volume from the Raman signal enhancement and the dephasing time of the plasmon, and found that the volume is on the same order as the one estimated from the topography of the sample.

本文言語English
ホスト出版物のタイトルFrontiers of Plasmon Enhanced Spectroscopy, Volume 2
編集者Yukihiro Ozaki, George C. Schatz, Duncan Graham, Tamitake Itoh
出版社American Chemical Society
ページ121-137
ページ数17
ISBN(電子版)9780841232013
DOI
出版ステータスPublished - 2016

出版物シリーズ

名前ACS Symposium Series
1246
ISSN(印刷版)0097-6156
ISSN(電子版)1947-5918

ASJC Scopus subject areas

  • 化学 (全般)
  • 化学工学(全般)

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