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Proceedings Paper

Effect of microwave radiation on the stability of terahertz hot-electron bolometer mixers
Author(s): Sergey Ryabchun; Cheuk-yu Edward Tong; Raymond Blundell; Robert Kimberk; Gregory Gol'tsman
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Paper Abstract

We report our studies of the effect of microwave radiation, with a frequency much lower than that corresponding to the energy gap of the superconductor, on the performance of the NbN hot-electron bolometer (HEB) mixer incorporated into a THz heterodyne receiver. It is shown that exposing the HEB mixer to microwave radiation does not result in a significant rise of the receiver noise temperature and degradation of the mixer conversion gain so long as the level of microwave power is small compared to the local oscillator drive. Hence the injection of a small, but controlled amount of microwave radiation enables active compensation of local oscillator power and coupling fluctuations which can significantly degrade the stability of HEB mixer receivers.

Paper Details

Date Published: 17 October 2006
PDF: 5 pages
Proc. SPIE 6373, Terahertz Physics, Devices, and Systems, 63730J (17 October 2006); doi: 10.1117/12.686291
Show Author Affiliations
Sergey Ryabchun, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Cheuk-yu Edward Tong, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Raymond Blundell, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Robert Kimberk, Harvard-Smithsonian Ctr. for Astrophysics (United States)
Gregory Gol'tsman, Moscow State Pedagogical Univ. (Russia)

Published in SPIE Proceedings Vol. 6373:
Terahertz Physics, Devices, and Systems
Mehdi Anwar; Anthony J. DeMaria; Michael S. Shur, Editor(s)

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