ISSTT Proceedings

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Hot Electron Detection and Mixing Experiments in NbN at 119 Micrometer Wavelength

Authors:
E. Gerecht, C.F. Musante, R. Schuch, C.R. Lutz Jr., K.S. Yngvesson, E.R. Mueller, J. Waldman, G.N. Gol'tsman, B.M. Voronov, E.M. Gershenzon
Abstract:
We have performed preliminary experiments with the goal of demonstrating a Hot Electron Bolometric (HEB) mixer for a 119 micrometer wavelength (2.5 THz). We have chosen a NbN device of size 700 × 350 micrometers. This device can easily be coupled to a laser LO source, which is advantageous for performing a prototype experiment. The relatively large size of the device means that the LO power required is in the mW range; this power can be easily obtained from a THz laser source. We have measured the amount of laser power actually absorbed in the device, and from this have estimated the best optical coupling loss to be about 10 dB. We are developing methods for improving the optical coupling further. Preliminary measurements of the response of the device to a chopped black-body have not yet resulted in a measured receiver noise temperature. We expect to be able to complete this measurement in the near future.
Categories:
HEB Mixers
Year:
1995
Session:
5
Full-text:
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Page Number(s):
284-293