A review is presented of recent advances in heterodyne detector and receiver technology for the 100 to 1000 µm wavelength region. The discussion is confined to the following four detector types: (1) the Schottky diode, (2) the bulk InSb detector, (3) the Ge:Ga photoconductor and (4) the SIS (luasiparticle mixer.
Elliott R Brown,
Peter E Tannenwald,
"Advances In Far-Infrared Heterodyne Detectors", Proc. SPIE 0666, Far-Infrared Science and Technology, (26 September 1986); doi: 10.1117/12.938819; https://doi.org/10.1117/12.938819