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Proceedings Paper

Membrane-based HEB mixer for THz applications
Author(s): Jean Baubert; Morvan Salez; Yan Delorme; Patrick Pons; Gregory Goltsman; Harald Merkel; Benoit Leconte
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Paper Abstract

We report in this paper a new concept for 2.7 THz superconducting Niobium nitride (NbN) Hot-Electron Bolometer mixer (HEB). The membrane process was developped for space telecommnunication applications a few years ago and the HEB mixer concept is now considered as the best choice for low-noise submillimeter-wave frequency heterodyne receivers. The idea is then to join these two technologies. The novel fabrication scheme is to fabricate a NbN HEB mixer on a 1 μm thick stress-less Si3N4/SiO2 membrane. This seems to present numerous improvements concerning : use at higher RF frequencies, power coupling efficiency, HEB mixer sensitivity, noise temperature, and space applications. This work is to be continued within the framework of an ESA TRP project, a 2.7 THz heterodyne camera with numerous applications including a SOFIA airborne receiver. This paper presents the whole fabrication process, the validation tests and preliminary results. Membrane-based HEB mixer theory is currently being investigated and further tests such as heterodyne and Fourier transform spectrometry measurement are planed shortly.

Paper Details

Date Published: 24 April 2003
PDF: 12 pages
Proc. SPIE 5116, Smart Sensors, Actuators, and MEMS, (24 April 2003); doi: 10.1117/12.499158
Show Author Affiliations
Jean Baubert, Observatoire de Paris (France)
Morvan Salez, Observatoire de Paris (France)
Yan Delorme, Observatoire de Paris (France)
Patrick Pons, LAAS-CNRS (United States)
Gregory Goltsman, Moscow State Pedagogical Univ. (Russia)
Harald Merkel, Chalmers Univ. (Sweden)
Benoit Leconte, Observatoire de Paris (France)

Published in SPIE Proceedings Vol. 5116:
Smart Sensors, Actuators, and MEMS
Jung-Chih Chiao; Vijay K. Varadan; Carles Cané, Editor(s)

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