L. Viti, A. Cadore, D. Purdie, J. Muench, Xinxin Yang, Kenji Watanabe, T. Taniguchi, A. Vorobiev, J. Stake, A. Lombardo, A. Ferrari, M. Vitiello
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High-speed, low-noise thermoelectric graphene detectors at terahertz frequencies
We report room temperature terahertz detection in hBN/graphene/hBN heterostructures, integrated in top-gated field effect transistors. The record combination of high-speed (response time < 1 ns) and high sensitivity (noise equivalent power ~ 100 pWHz-1I2) is enabled by the photo-thermoelectric effect and paves the way for the design of ultrafast graphene arrays in the far infrared, opening concrete perspectives for targeting ultrafast applications.