TY  - JOUR
AU  - Pentin, Ivan
AU  - Finkel, Matvey
AU  - Maslennikov, Sergey
AU  - Vakhtomin, Yuri
AU  - Smirnov, Konstantin
AU  - Kaurova, Nataliya
AU  - Goltsman, Gregory
PY  - 2017
DA  - 2017//
TI  - Superconducting hot-electron-bolometer mixers for the mid-IR
T2  - Rus. J. Radio Electron.
JO  - Rus. J. Radio Electron.
IS  - 10
KW  - IR NbN HEB mixers
AB  - The work presents the result of development of the NbN superconducting hot-electron-bolometer (HEB) mixer. The sensitive element of the mixer is directly coupled to mid-IR radiation, and doesn’t have planar metallic antenna. Investigations of noise characteristics of NbN HEB mixer were performed at the frequency 28.4 THz (λ = 10.6 µm) by using gas-discharge CW CO2-laser without consideration of optical and electrical losses in the heterodyne receiver. The noise temperature of NbN HEB mixer with the size of the sensitive element 10 µm × 10 µm was 2320 K (~ 1.5hν/kB) at the heterodyne frequency of 28.4 THz. The noise temperature was determined by measuring the Y-factor taking into account the term which describes fluctuations of zero-point oscillations in accordance with the fluctuation-dissipation theorem of Calle-Welton. Isothermal method was used to estimate the absorbed heterodyne radiation power which was 9 µW at the optimal operating point for the minimum noise temperature of NbN HEB mixer.
SN  - 1684-1719
UR  - http://jre.cplire.ru/jre/oct17/9/abstract_e.html
LA  - Russian
N1  - http://jre.cplire.ru/jre/oct17/9/abstract.html (Russian) Гетеродинный приемник со сверхпроводниковым смесителем на эффекте электронного разогрева для среднего инфракрасного диапазона
ID  - Pentin_etal2017
ER  -