Directionally controlled plasmon excitation in gold nanoparticles for near-field nanopatterning by femtosecond laser

Tomoya Miyanishi, Mitsuhiro Terakawa, Minoru Obara, Nikolay N. Nedyalkov, Petar A. Atanasov

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

    1 Citation (Scopus)

    Abstract

    We present theoretical and experimental results of nanohole fabrication on a silicon substrate by plasmonic near field around multiple gold nanoparticles excited by oblique incidence of femtosecond laser. Using the enhanced near field around a gold nanoparticle, nanohole can be fabricated on the substrate surface even at the near-infrared laser excitation. The formation of nanoholes with the near-infrared incident wavelength will open up smart applications for new optical device fabrication in air. However, the plasmons inside gold nanoparticles are affected by the plasmons of neighboring gold particles, resulting in an alteration of near-field distribution and the shift of resonant wavelength of plasmons inside the gold particles. These cause inhomogeneous shape of nanoholes and decrease the near-field intensity on silicon substrate. Therefore it is necessary to control the direction of plasmon for precise nanohole fabrication. We propose a new method to reduce plasmon interaction between particles by using p-polarized irradiation at oblique incidence to the substrate surface. Experimental and theoretical study demonstrated that uniformed nanoholes can be achieved by restraining effects from neighboring plasmon when p-polarized beam is irradiated to gold nanoparticle arrays with optimal oblique incidence.

    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

    • femtosecond laser nanofabrication
    • gold nanoparticles
    • oblique incidence
    • plasmonics

    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

    Miyanishi, T., Terakawa, M., Obara, M., Nedyalkov, N. N., & Atanasov, P. A. (2010). Directionally controlled plasmon excitation in gold nanoparticles for near-field nanopatterning by femtosecond laser. In XVIII International Symposium on Gas Flow, Chemical Lasers, and High-Power Lasers [77511X] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7751). https://doi.org/10.1117/12.880738