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Proceedings Paper

High speed hot-electron superconducting bolometer
Author(s): G. N. Gol'tsman
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Paper Abstract

Physical limitation of response time of a superconducting bolometer as well asthe nature of non-equilibrium detection of radiation have been investigated forAl, Nb and NbN thin films in spectral range from submillimeter to near-infraredwavelengths [1,2]. In the case of ideal heat removal from the film with the f_`. 100A thickness the detection mechanism is an electron heating effect that is notselective to radiation wavelength in a very broad range. The response time ofan electron heating bolometer is determined by an electron-phonon interactiontime. This time is of about 10 ns, 0.5 ns and 20 ps for Al, Nb, and NbNcorrespondingly near the critical temperature of the superconducting film. Thesensitive area of the bolometer consists of a number of narrow strips (with awidth of 1µm) connected in parallel to contact pads; these pads together witha sapphire substrate and a ground plate represent the microstrip transmissionline with an impedance of 50 Q.

Paper Details

Date Published: 30 August 1993
PDF: 2 pages
Proc. SPIE 2104, 18th International Conference on Infrared and Millimeter Waves, 21041K (30 August 1993); doi: 10.1117/12.2298488
Show Author Affiliations
G. N. Gol'tsman, Moscow State Pedagogical Univ. (Russian Federation)

Published in SPIE Proceedings Vol. 2104:
18th International Conference on Infrared and Millimeter Waves
James R. Birch; Terence J. Parker, Editor(s)

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