Nanodot coupler with a surface plasmon polariton condenser for optical far/near-field conversion

Wataru Nomura, Motoichi Ohtsu, Takashi Yatsui

    研究成果: Contribution to journalArticle査読

    194 被引用数 (Scopus)

    抄録

    To transmit an optical signal to a nanophotonic device, a nanodot coupler was fabricated from a linear array of closely spaced metallic nanoparticles. To increase the optical far- to near-field conversion efficiency for transmission, a surface plasmon polariton (SPP) condenser was also fabricated from hemispherical metallic nanoparticles so that it worked as a "phased array". The SPP was focused with a spot size as small as 400 nm at λ=785 nm. When the focused SPP was incident into the nanodot coupler, its transmission length through the nanodot coupler was confirmed to be 4.0 μm, which is three times longer than that of a metallic core waveguide owing to the efficient near-field coupling between the localized surface plasmon of neighboring nanoparticles. Furthermore, the transmission length through a zigzag-shaped nanodot coupler was as long as that through a linear one.

    本文言語英語
    論文番号181108
    ページ(範囲)1-3
    ページ数3
    ジャーナルApplied Physics Letters
    86
    18
    DOI
    出版ステータス出版済み - 5 2 2005

    All Science Journal Classification (ASJC) codes

    • Physics and Astronomy (miscellaneous)

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