Composite superconducting transition edge bolometer
- 15 June 1977
- journal article
- research article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 30 (12) , 664-666
- https://doi.org/10.1063/1.89278
Abstract
A composite far‐infrared bolometer has been constructed that uses an aluminum film at the superconducting transition temperature of 1.3 K as the temperature‐sensitive element. The film is evaporated on one edge of a 4×4‐mm sapphire substrate, which is coated on the reverse side with an absorbing film of bismuth. The best bolometer has an electrical NEP of (1.7±0.1) ×10−15 W Hz−1/2 at 2 Hz, and a specific detectivity D* of (1.1±0.1) ×1014 cm W−1 Hz1/2. This measured electrical NEP is within a factor 2 of the fundamental thermal noise limit.Keywords
This publication has 3 references indexed in Scilit:
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- Superconducting Transition Temperature of Thin FilmsPhysical Review Letters, 1965
- The application of superconductivity to thedetection of radiant energyCryogenics, 1961