Development of novel near-field microspectroscopy and imaging of local excitations and wave functions of nanomaterials

Kohei Imura*, Hiromi Okamoto

*この研究の対応する著者

研究成果: Article査読

32 被引用数 (Scopus)

抄録

We have developed novel methods of near-field microspectroscopy by combining near-field optical microscopy with linear and non-linear optical techniques. The developed near-field microscope achieves high spatial resolution and high time resolution, and is applied to studies of local excitations and wave functions of single noble metal nano-particles. We demonstrate that the plasmon wave functions and the optical fields in the vicinity of nanoparticles are visualized by the near-field methods. Based on these results, we clearly show that localized electromagnetic field enhancement in the vicinity of nanoparticles is one of the most important factors in surface-enhanced spectroscopies. We also extended the methods to ultrafast optical measurements, and show space-resolved ultrafast transient response of single gold nanorods. The characteristic spatio-temporal features observed in the nanorods are revealed to be arising from the changes of the plasmon-mode wave functions upon elevation of photo-induced electronic temperature of the nanorod.

本文言語English
ページ(範囲)659-675
ページ数17
ジャーナルBulletin of the Chemical Society of Japan
81
6
DOI
出版ステータスPublished - 2008
外部発表はい

ASJC Scopus subject areas

  • 化学 (全般)

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