ISSTT Proceedings

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Phonon-Cooled NbN HEB Mixers for Submillimeter Wavelengths

Authors:
J. Kawamura, R. Blundell, C- Y .E. Tong, G. Gol'tsman. E. Gershenzon, B. Voronov, S. Cherendichenko
Abstract:
The noise performance of receivers incorporating NbN phonon-cooled superconducting hot-electron bolometric mixers is measured from 200 GHz to 900 GHz. The mixer elements are thin-film (thickness ~4 nm) NbN with ~5 to 40 µm² area fabricated on crystalline quartz substrates. The receiver noise temperature from 200 GHz to 900 GHz demonstrates no unexpected degradation with increasing frequency, being roughly TRx [approx. equal to] 1-2 K GHz-¹. The best receiver noise temperatures are 410 K (DSB) at 430 GHz, 483 K at 636 GHz, and 1150 K at 800 GHz.
Categories:
Hot Electron Bolometers
Year:
1997
Session:
1
Full-text:
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Page Number(s):
23-28