Small-sized optical gate switch using Ge2Sb2Te 5 phase-change material integrated with silicon waveguide

Y. Ikuma, Y. Shoji, M. Kuwahara, X. Wang, K. Kintaka, H. Kawashima, D. Tanaka, H. Tsuda

    Research output: Contribution to journalArticlepeer-review

    53 Citations (Scopus)


    An optical gate switch using Ge2Sb2Te5 phase-change material integrated with a silicon waveguide is reported. The switch is very small (∼2m) owing to the large difference in absorption coefficient between the crystalline state and the amorphous state. The prototype switch has been fabricated and successfully switched from the transparent on-state to the opaque off-state by laser pulse irradiation. An extinction ratio of more than 12.5dB was achieved over a wavelength range of 75nm.

    Original languageEnglish
    Pages (from-to)368-369
    Number of pages2
    JournalElectronics Letters
    Issue number5
    Publication statusPublished - 2010 Mar 19

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering


    Dive into the research topics of 'Small-sized optical gate switch using Ge<sub>2</sub>Sb<sub>2</sub>Te <sub>5</sub> phase-change material integrated with silicon waveguide'. Together they form a unique fingerprint.

    Cite this