Nanopatterned graphene based long wavelength infrared detectors at room temperature

Due to the high cost and requirement for cryogenic cooling of Mercury Cadmium Telluride (MCT) detectors, there is a growing demand for cheap Long Wavelength Infrared (LWIR) detectors at room temperature. Graphene has shown great potential yet suffers from a low absorption (<3%) in the LWIR ranges. In this presentation, we demonstrate the asymmetric plasmon-assisted hot carrier generation and Seebeck photodetection in nano-patterned Graphene with an enhanced absorption (>60%). This novel Graphene photodetector exhibits a remarkable responsivity of 2900 VW-1, detectivity of 1.1 x 109 Jones with a fast response of 100ns in 8-12 μm band at room temperature.