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- Title
Normal-metal hot-electron bolometer with Andreev reflection from superconductor boundaries.
- Authors
Vystavkin, A. N.; Shuvaev, D. V.; Kuz’min, L. S.; Tarasov, M. A.; Aderstedt, E.; Willander, M.; Claeson, T.
- Abstract
This paper describes the design and experimental testing of a high-sensitivity hot-electron bolometer based a film of normal metal, exploiting the Andreev reflection from superconductor boundaries, and cooled with the help of a superconductor-insulator-normal metal junction. At the measured thermal conductivity, G ≈ 6 × 10[sup -12] W/K, and a time constant of τ = 0.2 µs, and a temperature of 300 mK, the estimated noise-equivalent power NEP = 5 × 10[sup -18] W/Hz[sup ½], assuming that temperature fluctuations are the major source of noise. At a temperature of 100 mK, the thermal conductivity drops to G ≈ 7 × 10[sup -14] W/K, which yields NEP = 2 × 10[sup -19] W/Hz[sup ½] at a time constant of τ = 5 µs. The microbolometer has been designed to serve as a detector of millimeter and FIR waves in space-based radio telescopes.
- Subjects
BOLOMETERS; SUPERCONDUCTORS
- Publication
Journal of Experimental & Theoretical Physics, 1999, Vol 88, Issue 3, p598
- ISSN
1063-7761
- Publication type
Article
- DOI
10.1134/1.558834