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  • 文献标题:   Efficient- and Broadband-Coupled Selective Spot-Size Converters With Damage-Free Graphene Integration Process
  • 文献类型:   Article
  • 作　　者:   KOU R, KOBAYASHI Y, WARABI K, NISHI H, TSUCHIZAWA T, YAMAMOTO T, NAKAJIMA H, YAMADA K
  • 作者关键词:   photonic device integration, graphene integration, fiber coupling
  • 出版物名称:   IEEE PHOTONICS JOURNAL
  • ISSN:   1943-0655 EI 1943-0647
  • 通讯作者地址:   Nippon Telegraph Tel Corp
  • 被引频次:   4
  • DOI:   10.1109/JPHOT.2014.2323297
  • 出版年:   2014

▎ 摘　　要

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.