Influence of graphene on quality factor variation in a silicon ring resonator

Rai Kou, Shinichi Tanabe, Tai Tsuchizawa, Tsuyoshi Yamamoto, Hiroki Hibino, Hirochika Nakajima, Koji Yamada

    Research output: Contribution to journalArticlepeer-review

    20 Citations (Scopus)


    Selectively patterned graphene is integrated onto a silicon ring resonator to investigate the quality factor (Q factor) variation. The Q factor sharply decreases from 7900 to 1200 as the patterned graphene length increases from 0 to 20 μm. A numerical estimation, which takes into account optical absorption by graphene, shows an exponential damping of the Q factor with increasing graphene length and is consistent with the experimental result. We expect these fundamental characterizations to be helpful in developing graphene-integrated silicon photonics applications.

    Original languageEnglish
    Article number091122
    JournalApplied Physics Letters
    Issue number9
    Publication statusPublished - 2014

    ASJC Scopus subject areas

    • Physics and Astronomy (miscellaneous)


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