Abstract :
The various mechanisms for the detection of millimeter-to-infrared radiation will be surveyed. Techniques to be covered include intrinsic photoconductors (such as HgCdTe), extrinsic photoconductors (mainly germanium doped with various impurities), free-carrier absorbers (such as InSb), superconducting Josephson-effect point contacts, carbon,and Ge cryogenic bolometers, and room-temperature bolometers (such as the thermistor, thermoelectric, and pyroelectric detectors).
