Spatial distribution of enhanced optical fields in one-dimensional linear arrays of gold nanoparticles studied by scanning near-field optical microscopy

Toru Shimada, Kohei Imura, Hiromi Okamoto*, Masahiro Kitajima

*この研究の対応する著者

研究成果: Article査読

14 被引用数 (Scopus)

抄録

We visualized the enhanced optical field distributions in one-dimensional linear array structures of gold nanospheres by using scanning near-field optical microscopy. The characteristic field distribution depends on the chain length of the one-dimensional structures. The distribution of optical field is reproduced qualitatively by model calculations based upon finite-difference time-domain (FDTD) method. From the analysis, we have found that the characteristic distribution of the enhanced field arises from interparticle interactions, which cause propagation of the plasmon excitation in the inner part of the linear array, and trapping of it by a localized mode at the edges.

本文言語English
ページ(範囲)4265-4269
ページ数5
ジャーナルPhysical Chemistry Chemical Physics
15
12
DOI
出版ステータスPublished - 2013 3 28

ASJC Scopus subject areas

  • 物理学および天文学(全般)
  • 物理化学および理論化学

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