Switching of localized surface plasmon resonance of gold nanoparticles on a GeSbTe film mediated by nanoscale phase change and modification of surface morphology

T. Hira, T. Homma, T. Uchiyama, K. Kuwamura, T. Saiki

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    22 Citations (Scopus)

    Abstract

    As a platform for active nanophotonics, localized surface plasmon resonance (LSPR) switching via interaction with a chalcogenide phase change material (GeSbTe) was investigated. We performed single-particle spectroscopy of gold nanoparticles placed on a GeSbTe thin film. By irradiation with a femtosecond pulsed laser for amorphization and a continuous wave laser for crystallization, significant switching behavior of the LSPR band due to the interaction of GeSbTe was observed. The switching mechanism was explained in terms of both a change in the refractive index and a modification of surface morphology accompanying volume expansion and reduction of GeSbTe.

    Original languageEnglish
    Article number241101
    JournalApplied Physics Letters
    Volume103
    Issue number24
    DOIs
    Publication statusPublished - 2013 Dec 9

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)

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