Superconducting tunnel junction bolometers
- 1 January 1974
- journal article
- Published by EDP Sciences in Revue de Physique Appliquée
- Vol. 9 (1), 69-71
- https://doi.org/10.1051/rphysap:019740090106900
Abstract
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 anticipatedKeywords
This publication has 3 references indexed in Scilit:
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- Comparative studies of noise limitations in superconducting thin-film radiation detectorsProceedings of the IEEE, 1973
- The Measurement of Thermal Radiation at Microwave FrequenciesReview of Scientific Instruments, 1946