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Author
Pentin, Ivan
;
Finkel, Matvey
;
Maslennikov, Sergey
;
Vakhtomin, Yuri
;
Smirnov, Konstantin
;
Kaurova, Nataliya
;
Goltsman, Gregory
Title
Superconducting hot-electron-bolometer mixers for the mid-IR
Type
Journal Article
Year
2017
Publication
Rus. J. Radio Electron.
Abbreviated Journal
Rus. J. Radio Electron.
Volume
Issue
10
Pages
Keywords
IR NbN HEB mixers
Abstract
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.
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Language
Russian
Summary Language
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ISSN
1684-1719
ISBN
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Notes
http://jre.cplire.ru/jre/oct17/9/abstract.html (Russian) Гетеродинный приемник со сверхпроводниковым смесителем на эффекте электронного разогрева для среднего инфракрасного диапазона
Approved
no
Call Number
Serial
1747
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