Abstract
An essential task in infrared (IR) technology is to develop and exploit advanced photodetectors, to enable both fundamental research and applications. The authors utilize quantum Hall states and cyclotron-resonance absorption in a hybrid graphene-GaAs/Al${}_{x}$Ga${}_{1-x}$As system to implement a dual-band, tunable detector covering both mid- and far-IR wavelengths, with a log-periodic antenna to minimize chip size and significantly enhance the photoresponse. These results point toward a panoply of solutions for highly sensitive, tunable, multicolor IR detectors and imaging arrays.
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