PT Unknown AU Gol'tsman, G Semenov, A Smirnov, K Voronov, B TI Background limited quantum superconducting detector for submillimeter wavelengths SE Proc. 12[super:th] Int. Symp. Space Terahertz Technol. PY 2001 BP 469 EP 475 DE Ti SQD; SQUID readout ER