Sub-wavelength antenna enhanced bilayer graphene tunable photodetector

DWPI Title: Resonant sub-wavelength antenna enhanced bilayer graphene tunable photodetector, has gate dielectric layer placed between source and drain that are placed on bilayer graphene layer for forming dual-gated FET
Abstract: The integration of bilayer graphene with an absorption enhancing sub-wavelength antenna provides an infrared photodetector capable of real-time spectral tuning without filters at nanosecond timescales.
Use: Resonant sub-wavelength antenna enhanced bilayer graphene tunable photodetector.
Advantage: The photodetector facilitates dynamic real-time tunability so as to enable multi-color operation and flexibility to optimize based upon differing operational imperatives. The photodetector can be operated with reduced cooling requirements since graphene devices exhibit very low noise characteristics, and combines bilayer graphene in a resonant antenna structure to enhance infrared absorption to specific degree proportional to increase in electric field enhancement in an effective manner.
Novelty: The photodetector has a gate dielectric layer (18) placed on a bilayer graphene layer (15). An antenna top gate is placed on the dielectric layer, where the top gate and dielectric layer amplify absorption of incident light in the graphene layer by resonant surface mode coupling. A conductive back gate (12) is placed on a backside of and insulated from the graphene layer for applying electric field with the top gate across the graphene layer to tune bandgap. The dielectric layer is placed between a source (16) and a drain (17) that are placed on the graphene layer for forming a dual-gated FET.
Filed: 10/17/2013
Application Number: US14056023A
Tech ID: SD 12117.1
This invention was made with Government support under Contract No. DE-NA0003525 awarded by the United States Department of Energy/National Nuclear Security Administration. The Government has certain rights in the invention.
Data from Derwent World Patents Index, provided by Clarivate
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