Graphene has shown great potentials 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 micron long layer of graphene with field-enhancing nano-sized metallic structures, demonstrates a high external responsivity of 0.5 A/W and a fast photoresponse way beyond 110 GHz. The high efficiency and fast response of the device enables for the first time 100 Gbit/s PAM-2 and 100 Gbit/s PAM-4 data reception with a graphene based device. The results show the potential of graphene as a new technology for highest-speed communication applications.
@article{arxiv.1808.10823,
title = {Plasmonically enhanced graphene photodetector featuring 100 GBd, high-responsivity and compact size},
author = {Ping Ma and Yannick Salamin and Benedikt Baeuerle and Arne Josten and Wolfgang Heni and Yuriy Fedoryshyn and Alexandros Emboras and Juerg Leuthold},
journal= {arXiv preprint arXiv:1808.10823},
year = {2019}
}