Noise performance of quasioptical ultrathin NbN hot-electron bolometer mixer at 2.5 and 3.8 THz

To put space-based and airborne heterodyne instruments into operation at frequencies above 1 THz the superconducting NbN hot-electron bolometer (HEB) will be incorporated into heterodyne receiver as a mixer. At frequencies above 1.3 THz the sensitivity of the NbN HEB mixers outperform the one of the...

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Published inThe Fifth International Kharkov Symposium on Physics and Engineering of Microwaves, Millimeter, and Submillimeter Waves (IEEE Cat. No.04EX828) Vol. 2; pp. 592 - 594 Vol.2
Main Authors Antipov, S.V., Vachtornin, Yu.B., Maslennikov, S.N., Smirnov, K.V., Kaurova, N.S., Grishina, E.V., Voronov, B.M., Goltsman, G.N.
Format Conference Proceeding
LanguageEnglish
Published IEEE 2004
Subjects
Bolometers
Frequency
Instruments
Schottky diodes
Semiconductor films
Superconducting device noise
Superconducting epitaxial layers
Superconducting films
Temperature measurement
Temperature sensors
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Summary:To put space-based and airborne heterodyne instruments into operation at frequencies above 1 THz the superconducting NbN hot-electron bolometer (HEB) will be incorporated into heterodyne receiver as a mixer. At frequencies above 1.3 THz the sensitivity of the NbN HEB mixers outperform the one of the Schottky diodes and SIS-mixers, and the receiver noise temperature of the NbN HEB mixers increase with frequency. In this paper we present the results of the noise temperature measurements within one batch of NbN HEB mixers based on 3.5 mn thick superconducting NbN film grown on Si substrate with MgO buffer layer at the LO frequencies 2.5 THz and 3.8 THz.
ISBN:0780384113
9780780384118
DOI:10.1109/MSMW.2004.1346031