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Ultra-compact integrated graphene plasmonic photodetector with bandwidth above 110 GHz
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Ultra-compact integrated graphene plasmonic photodetector with bandwidth above 110 GHz
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Journal Article
Ultra-compact integrated graphene plasmonic photodetector with bandwidth above 110 GHz
2020
Overview
Graphene-based photodetectors, taking advantage of the high carrier mobility and broadband absorption in graphene, have recently seen rapid development. However, their performance with respect to responsivity and bandwidth is still limited by the weak light-graphene interaction and large resistance-capacitance product. Here, we demonstrate a waveguide-coupled integrated graphene plasmonic photodetector on a silicon-on-insulator platform. Benefiting from plasmon-enhanced graphene-light interaction and subwavelength confinement of the optical energy, a small-footprint graphene-plasmonic photodetector is achieved working at the telecommunication window, with a large a bandwidth beyond 110 GHz and a high intrinsic responsivity of 360 mA/W. Attributed to the unique electronic band structure of graphene and its ultra-broadband absorption, operational wavelength range extending beyond mid-infrared, and possibly further, can be anticipated. Our results show that the combination of graphene with plasmonic devices has great potential to realize ultra-compact, high-speed optoelectronic devices for graphene-based optical interconnects.
Publisher
De Gruyter,John Wiley & Sons, Inc,Wiley
Subject
