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We will report on the high-frequency operation of QCDs, ICDs, and QWIPs connected to a monolithic coplanar transmission line without air-bridge. A single-period QCD with more than 0.8 A/W responsivity at 300K paves the way towards sensitive multiheterodyne detection at room-temperature.
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Gottfried Strasser, Johannes Hillbrand, Hedwig Knötig, Sandro Dal Cin, Robert Weih, Aaron M. Andrews, Hermann Detz, Benedikt Schwarz, "Frequency performance of intersubband detectors," Proc. SPIE 11700, Optical and Quantum Sensing and Precision Metrology, 1170040 (5 March 2021); https://doi.org/10.1117/12.2586923