Visualizing the optical field structures in metal nanostructures

Hiromi Okamoto, Kohei Imura

    研究成果: Article

    31 引用 (Scopus)

    抄録

    Noble metal nanostructures yield confined optical fields on a nanometer scale due to plasmon resonances, and they have potentially novel applications in spectroscopic analysis, photochemical reactions, optical devices, bioimaging, and so forth. To design nanoscale confined optical fields for use in specific applications, visualization of the fields is needed to provide essential information. We adopted near-field optical microscopy to visualize the optical fields in the present study. Examples of the direct visualization of optical fields in metal nanostructures are presented together with the analysis of the unique spectroscopic characteristics based on near-field imaging. For single nanoparticles such as gold nanorods, the plasmon standing wave functions and/or enhanced local fields near the particles were visualized depending on the particle shapes and sizes. In the assembled nanoparticles, the enhanced optical fields at the gap sites between the particles were visualized, thus elucidating the mechanism of surface-enhanced Raman scattering. The characteristic optical fields for various other metal nanostructures are also discussed.

    元の言語English
    ページ(範囲)2230-2241
    ページ数12
    ジャーナルJournal of Physical Chemistry Letters
    4
    発行部数13
    DOI
    出版物ステータスPublished - 2013 7 3

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    Nanostructures
    near fields
    Metals
    Visualization
    metals
    Nanoparticles
    nanoparticles
    Spectroscopic analysis
    Photochemical reactions
    spectroscopic analysis
    Precious metals
    Wave functions
    Optical devices
    noble metals
    Nanorods
    standing waves
    Gold
    photochemical reactions
    nanorods
    Optical microscopy

    ASJC Scopus subject areas

    • Materials Science(all)

    これを引用

    Visualizing the optical field structures in metal nanostructures. / Okamoto, Hiromi; Imura, Kohei.

    :: Journal of Physical Chemistry Letters, 巻 4, 番号 13, 03.07.2013, p. 2230-2241.

    研究成果: Article

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