Characterization of optical absorption and polarization dependence of single-layer graphene integrated on a silicon wire waveguide

Rai Kou, Shinichi Tanabe, Tai Tsuchizawa, Kaori Warabi, Satoru Suzuki, Hiroki Hibino, Hirochika Nakajima, Koji Yamada

    Research output: Contribution to journalArticlepeer-review

    31 Citations (Scopus)

    Abstract

    Optical absorption efficiency of graphene integrated onto a silicon photonic platform was characterized at around 1.55-μm optical telecommunications wavelength. Micro-Raman spectroscopy performed after the completion of all fabrication processes confirmed that transferred chemical-vapor-deposited graphene is a single layer (>90% coverage) without any significant damage. Absorption efficiencies of the single-layer graphene (SLG) on a silicon wire waveguide, obtained by measuring different lengths (cutback method) of the SLG from 2.5 to 200 μm, were 0.09 and 0.05 dB/μm for TE- and TM-polarized light. The unusual relationship in the polarization dependency can be explained by strong surface-plasmon-porlariton support in the TM mode.

    Original languageEnglish
    Article number060203
    JournalJapanese Journal of Applied Physics
    Volume52
    Issue number6 PART 1
    DOIs
    Publication statusPublished - 2013 Jun

    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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