Efficient- and Broadband-Coupled Selective Spot-Size Converters With Damage-Free Graphene Integration Process

Rai Kou, Yuzuki Kobayashi, Kaori Warabi, Hidetaka Nishi, Tai Tsuchizawa, Tsuyoshi Yamamoto, Hirochika Nakajima, Koji Yamada

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    We report an enhancement of coupling efficiency between an optical fiber and graphene photonic device integrated on a silicon photonics platform. The design and optimization of selective spot-size converters (SSSCs) enables low coupling losses of 1.4 dB/facet for TE and 2.4 dB/facet for TM modes without causing damage to the graphene. In order to maximize the potential of the perfect wavelength independent response in the graphene, ultra-broad-bandwidth coupling from O- to U-bands (1300-1650 nm) is characterized. The bandwidth is over 300 nm (at 3-dB roll off) in both polarization modes. We integrated the SSSCs with a partially graphene integrated silicon-ring resonator to substantiate the wavelength response improvement by a pico-meter-order high-resolution spectroscopy.

    Original languageEnglish
    Article number6600409
    JournalIEEE Photonics Journal
    Volume6
    Issue number3
    DOIs
    Publication statusPublished - 2014 Jun 1

    Fingerprint

    Graphene
    converters
    graphene
    broadband
    damage
    flat surfaces
    photonics
    bandwidth
    Bandwidth
    Silicon
    Wavelength
    Photonic devices
    silicon
    wavelengths
    Photonics
    Optical fibers
    Resonators
    platforms
    optical fibers
    resonators

    Keywords

    • fiber coupling
    • graphene integration
    • Photonic device integration

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering
    • Atomic and Molecular Physics, and Optics

    Cite this

    Kou, R., Kobayashi, Y., Warabi, K., Nishi, H., Tsuchizawa, T., Yamamoto, T., ... Yamada, K. (2014). Efficient- and Broadband-Coupled Selective Spot-Size Converters With Damage-Free Graphene Integration Process. IEEE Photonics Journal, 6(3), [6600409]. https://doi.org/10.1109/JPHOT.2014.2323297

    Efficient- and Broadband-Coupled Selective Spot-Size Converters With Damage-Free Graphene Integration Process. / Kou, Rai; Kobayashi, Yuzuki; Warabi, Kaori; Nishi, Hidetaka; Tsuchizawa, Tai; Yamamoto, Tsuyoshi; Nakajima, Hirochika; Yamada, Koji.

    In: IEEE Photonics Journal, Vol. 6, No. 3, 6600409, 01.06.2014.

    Research output: Contribution to journalArticle

    Kou, R, Kobayashi, Y, Warabi, K, Nishi, H, Tsuchizawa, T, Yamamoto, T, Nakajima, H & Yamada, K 2014, 'Efficient- and Broadband-Coupled Selective Spot-Size Converters With Damage-Free Graphene Integration Process', IEEE Photonics Journal, vol. 6, no. 3, 6600409. https://doi.org/10.1109/JPHOT.2014.2323297
    Kou, Rai ; Kobayashi, Yuzuki ; Warabi, Kaori ; Nishi, Hidetaka ; Tsuchizawa, Tai ; Yamamoto, Tsuyoshi ; Nakajima, Hirochika ; Yamada, Koji. / Efficient- and Broadband-Coupled Selective Spot-Size Converters With Damage-Free Graphene Integration Process. In: IEEE Photonics Journal. 2014 ; Vol. 6, No. 3.
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