Ultrafast vibrations of gold nanorings

T. A. Kelf, Y. Tanaka, O. Matsuda, E. M. Larsson, D. S. Sutherland, O. B. Wright*

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    59 Citations (Scopus)

    Abstract

    We investigate the vibrational modes of gold nanorings on a silica substrate with an ultrafast optical technique. By comparison with numerical simulations, we identify several resonances in the gigahertz range associated with axially symmetric deformations of the nanoring and substrate. We elucidate the corresponding mode shapes and find that the substrate plays an important role in determining the mode damping. This study demonstrates the need for a plasmonic nano-optics approach to understand the optical excitation and detection mechanisms for the vibrations of plasmonic nanostructures.

    Original languageEnglish
    Pages (from-to)3893-3898
    Number of pages6
    JournalNano Letters
    Volume11
    Issue number9
    DOIs
    Publication statusPublished - 14 Sep 2011

    Keywords

    • gigahertz
    • Nanostructure
    • plasmonics
    • ring
    • ultrafast
    • vibrations

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