Ultra-small, self-holding, optical gate switch using Ge2Sb 2Te5 with a multi-mode Si waveguide

Daiki Tanaka, Yuya Shoji, Masashi Kuwahara, Xiaomin Wang, Kenji Kintaka, Hitoshi Kawashima, Tatsuya Toyosaki, Yuichiro Ikuma, Hiroyuki Tsuda

    Research output: Contribution to journalArticlepeer-review

    55 Citations (Scopus)


    We report a multi-mode interference-based optical gate switch using a Ge2Sb2Te5 thin film with a diameter of only 1 μm. The switching operation was demonstrated by laser pulse irradiation. This switch had a very wide operating wavelength range of 100 nm at around 1575 nm, with an average extinction ratio of 12.6 dB. Repetitive switching over 2,000 irradiation cycles was also successfully demonstrated. In addition, selfholding characteristics were confirmed by observing the dynamic responses, and the rise and fall times were 130 ns and 400 ns, respectively.

    Original languageEnglish
    Pages (from-to)10283-10294
    Number of pages12
    JournalOptics Express
    Issue number9
    Publication statusPublished - 2012 Apr 23

    ASJC Scopus subject areas

    • Atomic and Molecular Physics, and Optics

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