Nano-surface patterning by femtosecond laser for plasmonic surface optical applications

Go Obara, Tomoya Miyanishi, Yuto Tanaka, Mitsuhiro Terakawa, Minoru Obara

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    Abstract

    For plasmonic surface optical applications, localized optical field distribution properties in the vicinity of gold particles on a silicon substrate by backward and forward irradiation are presented. It is technically difficult to fabricate nanostructure on the surface by conventional forward laser incidence to the substrate because gold nanoparticles easily aggregate to form double-layered particle arrays. We calculated enhanced optical field properties in order to pattern the substrate surface only with a template of the bottom-layered particle arrays in case that the backward irradiation of femtosecond laser is used in the system of aggregated double-layered gold nanoparticle arrays. With the backward irradiation, the optical field intensity in the substrate for the double-layered hexagonal arrays is found to be only 30% lower than the mono-layered system. Moreover, near-field cannot be generated with the forward irradiation. As a result, only the backward irradiation scheme is found to be effective for uniform surface nanopatterning at enhanced plasmonic near-field zones.

    Original languageEnglish
    Title of host publicationXVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
    DOIs
    Publication statusPublished - 2010 Dec 1
    Event18th International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers - Sofia, Bulgaria
    Duration: 2010 Aug 302010 Sep 3

    Publication series

    NameProceedings of SPIE - The International Society for Optical Engineering
    Volume7751
    ISSN (Print)0277-786X

    Other

    Other18th International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers
    CountryBulgaria
    CitySofia
    Period10/8/3010/9/3

    Keywords

    • gold particles
    • nanofabrication
    • near-field
    • plasmonics
    • surface patterning

    ASJC Scopus subject areas

    • Electronic, Optical and Magnetic Materials
    • Condensed Matter Physics
    • Computer Science Applications
    • Applied Mathematics
    • Electrical and Electronic Engineering

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  • Cite this

    Obara, G., Miyanishi, T., Tanaka, Y., Terakawa, M., & Obara, M. (2010). Nano-surface patterning by femtosecond laser for plasmonic surface optical applications. In XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers [77511Y] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7751). https://doi.org/10.1117/12.881486