Plasmonically Enhanced Graphene Photodetector Featuring 100 Gbit/s Data Reception, High Responsivity, and Compact Size

By P. Ma, Y. Salamin, B. Baeuerle, A. Josten, W. Heni, A. Emboras, Juerg Leuthold. ACS Photonics, 2018

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Graphene has shown great potential for high-speed photodetection. Yet, the responsivities of graphene-based high-speed photodetectors are commonly limited by the weak effective absorption of atomically thin graphene. Here, we propose and experimentally demonstrate a plasmonically enhanced waveguide-integrated graphene photodetector. The device, which combines a 6 μm long layer of graphene with field-enhancing nanosized metallic structures, demonstrates a high external responsivity of 0.5 A/W and a fast photoresponse up to at least 110 GHz. The high efficiency and fast response of the device enables for the first time 100 Gbit/s on–off keying and 100 Gbit/s PAM-4 intensity modulated data reception with a graphene-based device. The results show the potential of graphene as a new technology for highest speed communication applications.

Subfields: Atomic and Molecular Physics, and Optics, Biomedical Engineering, Materials Chemistry

View Paper: https://www.semanticscholar.org/paper/160163745d177ec783c4eaf8a40374e9ebcc3631