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Bias-dependence of the thermal time constant in diffusion-cooled superconducting hot-electron bolometer mixers.
- Source :
- Applied Physics Letters; 9/11/2000, Vol. 77 Issue 11
- Publication Year :
- 2000
-
Abstract
- We present an experimental study of the intermediate frequency bandwidth of a Nb diffusion-cooled hot-electron bolometer mixer for different bias voltages. The measurements show that the bandwidth increases with increasing voltage. Analysis of the data reveals that this effect is mainly caused by a decrease of the intrinsic thermal time of the mixer and that the effect of electrothermal feedback through the intermediate frequency circuit is small. The results are understood using a qualitative model, which takes into account the different effective diffusion constants in the normal and superconducting domains. © 2000 American Institute of Physics. [ABSTRACT FROM AUTHOR]
- Subjects :
- BOLOMETERS
MIXING circuits
Subjects
Details
- Language :
- English
- ISSN :
- 00036951
- Volume :
- 77
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Applied Physics Letters
- Publication Type :
- Academic Journal
- Accession number :
- 4413689
- Full Text :
- https://doi.org/10.1063/1.1287909