We demonstrate frequency-selective and frequency-tunable detection of #teraherz (THz) radiation at ambient conditions in short-channel #graphene transistors. Plasmon resonances occuring in such devices are able to survive at room temperature due to the high intrinsic mobility of charge carriers in monolayer graphene. These functional THz photodetectors can be used in a wide range of applications including selective sensing, frequency mixing, signal modulation or nanoscale confinement of light.
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