Superconducting tunnel junction bolometers
نویسندگان
چکیده
2014 Two new types of superconducting infrared bolometer are described. In one, the temperature dependent Josephson current in an SNS junction is measured with a SQUID galvanometer. In the other, the temperature-dependent quasiparticle tunneling current in an SIN junction is measured with a conventional fet amplifier. Either type of junction is deposited on a low heat capacity sapphire substrate covered on the reverse side with a thin Bi film to absorb infrared radiation. The best performance achieved thus far is for the SNS bolometer which has an electrical NEP ~ 5 x 10-15 W/~Hz and D* ~ 1014 cm. W-1. Hz1/2. Some improvement in these values is anticipated. REVUE DE PHYSIQUE APPLIQUÉE TOME 9, JANVIER 1974, PAGE
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