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

    Research output: Contribution to journalArticle

    11 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Pages (from-to)4265-4269
    Number of pages5
    JournalPhysical Chemistry Chemical Physics
    Volume15
    Issue number12
    DOIs
    Publication statusPublished - 2013 Mar 28

    Fingerprint

    Near field scanning optical microscopy
    linear arrays
    Gold
    Spatial distribution
    near fields
    spatial distribution
    gold
    Nanoparticles
    microscopy
    nanoparticles
    scanning
    Nanospheres
    Finite difference time domain method
    Chain length
    finite difference time domain method
    trapping
    propagation
    causes
    excitation
    interactions

    ASJC Scopus subject areas

    • Physical and Theoretical Chemistry
    • Physics and Astronomy(all)

    Cite this

    Spatial distribution of enhanced optical fields in one-dimensional linear arrays of gold nanoparticles studied by scanning near-field optical microscopy. / Shimada, Toru; Imura, Kohei; Okamoto, Hiromi; Kitajima, Masahiro.

    In: Physical Chemistry Chemical Physics, Vol. 15, No. 12, 28.03.2013, p. 4265-4269.

    Research output: Contribution to journalArticle

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