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In this paper, we present a low noise integrated heterodyne receiver at 2.7 THz. This heterodyne receiver is based on a superconducting hot electron bolometer (HEB) mixer and a low power consumption quantum cascade laser (QCL) that are both integrated on the same 4 K stage of a pulse tube cooler. We measured the noise temperature of the HEB/QCL integrated heterodyne receiver by using hot and cold...
In this paper, the performance of a twin-slot antenna coupled NbN superconducting HEB mixer based on a new device fabrication process is thoroughly investigated. The measured lowest double-sideband receiver noise temperature is about 600 K at 1.3 THz, and reduced to 300 K after eliminating all the quasi-optical losses. The spectral response of the HEB mixer is characterized by a Fourier Transform...
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