Ultra-compact graphene plasmonic photodetector with the bandwidth over 110GHz

Abstract

Graphene-based photodetectors, taking advantage of high carrier mobility and broadband absorption in graphene, have recently experienced rapid development. However, their performances with respect to the responsivity and bandwidth are still limited by either weak light-graphene interaction or large resistance-capacitance product. Here, we demonstrate a waveguide coupled integrated graphene plasmonic photodetector on the silicon-on-insulator platform. Benefiting from plasmonic enhanced graphene-light interactions and subwavelength confinement of the optical energy, we present a small-footprint graphene-plasmonic photodetector with bandwidth beyond 110GHz and intrinsic responsivity of 360mA/W. Attributed to the unique electronic bandstructure of graphene and its ultra-broadband absorption, the 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 and high-speed optoelectronic devices for graphene-based optical interconnects.

arXiv comment6 pages, 4 figures, supplementary materials are available under request

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• Advances in ultrafast plasmonics
• Plasmonic graphene photodetector based on channel photo-thermoelectric effect
• Graphene Plasmonic Fractal Metamaterials for Broadband Photodetectors
• Plasmon-enhanced graphene photodetector with CMOS-compatible titanium nitride
• High bandwidth waveguide-integrated plasmonic germanium photodetector
• High-Performance All-Optical Modulator Based on Graphene-hBN Heterostructures
• Anisotropic Van der Waals 2D GeAs Integrated on Silicon Four-Waveguide Crossing
• Compact Graphene Plasmonic Slot Photodetector on Silicon-on-insulator with High Responsivity
• Roadmap for Gain-Bandwidth-Product Enhanced Photodetectors