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Author Шангина, Е. Л.; Смирнов, К. В.; Морозов, Д. В.; Ковалюк, В. В.; Гольцман, Г. Н.; Веревкин, А. А.; Торопов, А. И. url  openurl
  Title Полоса и потери преобразования полупроводникового смесителя с фононным каналом охлаждения двумерных электронов Type Journal Article
  Year 2010 Publication Физика и техника полупроводников Abbreviated Journal  
  Volume (down) 44 Issue 11 Pages 1475-1478  
  Keywords 2DEG, AlGaAs/GaAs heterostructures mixers  
  Abstract Методом субмиллиметровой спектроскопии с высоким временным разрешением измерены температурная и концентрационная зависимости полосы преобразования смесителей терагерцового диапазона AlGaAs/GaAs на разогреве двумерных электронов с фононным каналом их охлаждения. Полоса преобразования на уровне 3 дБ (f3 dB) при 4.2 K при изменении концентрации ns варьируется в пределах 150-250 МГц в соответствии со степенным законом f3 dB propto ns-0.5, что соответствует доминирующему механизму рассеяния на пьезоэлектрических фононах. Минимальное значение коэффициента потерь преобразования полупроводникового смесителя достигается в структурах с высокой подвижностью носителей mu>3·105 см2/В·с при 4.2 K.  
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  Notes Duplicated as 1216 Approved no  
  Call Number RPLAB @ gujma @ Serial 702  
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Author Shangina, E. L.; Smirnov, K. V.; Morozov, D. V.; Kovalyuk, V. V.; Gol’tsman, G. N.; Verevkin, A. A.; Toropov, A. I. url  doi
openurl 
  Title Frequency bandwidth and conversion loss of a semiconductor heterodyne receiver with phonon cooling of two-dimensional electrons Type Journal Article
  Year 2010 Publication Semicond. Abbreviated Journal Semicond.  
  Volume (down) 44 Issue 11 Pages 1427-1429  
  Keywords 2DEG, AlGaAs/GaAs heterostructures mixers  
  Abstract The temperature and concentration dependences of the frequency bandwidth of terahertz heterodyne AlGaAs/GaAs detectors based on hot electron phenomena with phonon cooling of two-dimensional electrons have been measured by submillimeter spectroscopy with a high time resolution. At a temperature of 4.2 K, the frequency bandwidth at a level of 3 dB (f 3 dB) is varied from 150 to 250 MHz with a change in the concentration n s according to the power law f 3dB ∝ n −0.5 s due to the dominant contribution of piezoelectric phonon scattering. The minimum conversion loss of the semiconductor heterodyne detector is obtained in structures with a high carrier mobility (μ > 3 × 105 cm2 V−1 s−1 at 4.2 K).  
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  Series Volume Series Issue Edition  
  ISSN 1063-7826 ISBN Medium  
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  Notes Полоса и потери преобразования полупроводникового смесителя с фононным каналом охлаждения двумерных электронов Approved no  
  Call Number Serial 1216  
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Author Florya, I. N.; Korneeva, Y. P.; Mikhailov, M. Y.; Devizenko, A. Y.; Korneev, A. A.; Goltsman, G. N. url  doi
openurl 
  Title Photon counting statistics of superconducting single-photon detectors made of a three-layer WSi film Type Journal Article
  Year 2018 Publication Low Temp. Phys. Abbreviated Journal Low Temp. Phys.  
  Volume (down) 44 Issue 3 Pages 221-225  
  Keywords WSi SSPD, SNSPD  
  Abstract Superconducting nanowire single-photon detectors (SNSPD) are used in quantum optics when record-breaking time resolution, high speed, and exceptionally low levels of dark counts (false readings) are required. Their detection efficiency is limited, however, by the absorption coefficient of the ultrathin superconducting film for the detected radiation. One possible way of increasing the detector absorption without limiting its broadband response is to make a detector in the form of several vertically stacked layers and connect them in parallel. For the first time we have studied single-photon detection in a multilayer structure consisting of three superconducting layers of amorphous tungsten silicide (WSi) separated by thin layers of amorphous silicon. Two operating modes of the detector are illustrated: an avalanche regime and an arm-trigger regime. A shift in these modes occurs at currents of ∼0.5–0.6 times the critical current of the detector.

This work was supported by technical task No. 88 for scientific research at the National Research University “Higher School of Economics,” Grant No. 14.V25.31.0007 from the Ministry of Education and Science of Russia, and the work of G. N. Goltsman was supported by task No. 3.7328.2017/VU of the Ministry of Education and Science of Russia.
 
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  ISSN 1063-777X ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1310  
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Author Kitaeva, G. K.; Kornienko, V. V.; Kuznetsov, K. A.; Pentin, I. V.; Smirnov, K. V.; Vakhtomin, Y. B. url  doi
openurl 
  Title Direct detection of the idler THz radiation generated by spontaneous parametric down-conversion Type Journal Article
  Year 2019 Publication Opt. Lett. Abbreviated Journal Opt. Lett.  
  Volume (down) 44 Issue 5 Pages 1198-1201  
  Keywords HEB applications  
  Abstract We study parametric down-conversion (PDC) of optical laser radiation in the strongly frequency non-degenerate regime which is promising for the generation of quantum-correlated pairs of extremely different spectral ranges, the optical and the terahertz (THz) ones. The possibility to detect tenuous THz-frequency photon fluxes generated under low-gain spontaneous PDC is demonstrated using a hot electron bolometer. Then experimental dependences of the THz radiation power on the detection angle and on the pump intensity are analyzed.  
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  Series Volume Series Issue Edition  
  ISSN 0146-9592 ISBN Medium  
  Area Expedition Conference  
  Notes PMID:30821747 Approved no  
  Call Number Serial 1801  
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Author Divochiy, A.; Misiaszek, M.; Vakhtomin, Y.; Morozov, P.; Smirnov, K.; Zolotov, P.; Kolenderski, P. url  doi
openurl 
  Title Single photon detection system for visible and infrared spectrum range Type Journal Article
  Year 2018 Publication Opt. Lett. Abbreviated Journal Opt. Lett.  
  Volume (down) 43 Issue 24 Pages 6085-6088  
  Keywords  
  Abstract We demonstrate niobium nitride based superconducting single-photon detectors sensitive in the spectral range 452-2300 nm. The system performance was tested in a real-life experiment with correlated photons generated by means of spontaneous parametric downconversion, where one photon was in the visible range and the other was in the infrared range. We measured a signal to noise ratio as high as 4x10(4) in our detection setting. A photon detection efficiency as high as 64% at 1550 nm and 15% at 2300 nm was observed.  
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  Language English Summary Language Original Title  
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  ISSN 0146-9592 ISBN Medium  
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  Notes https://arxiv.org/abs/1807.04273 Approved no  
  Call Number Serial 1227  
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Author Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G. url  openurl
  Title Investigation of free excitons in Ge and their condensation at submillimeter wavelengths Type Journal Article
  Year 1976 Publication Sov. Phys. JETP Abbreviated Journal Sov. Phys. JETP  
  Volume (down) 43 Issue 1 Pages 116-122  
  Keywords Ge, free excitons  
  Abstract Results are presented of an investigation of free excitons in Ge in the submillimeter wavelength range for low as well as for high excitation levels when interaction between the excitons becomes important. The free-exciton energy spectrum is discussed. It is shown that the drop radii and their concentrations can be determined by measuring the temperature dependence of the free-exciton concentration. A section of the phase diagram is obtained in the 0.5-2.8 K temperature range for the free excitons+condensate system.  
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  Notes Approved no  
  Call Number Serial 1731  
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Author Tret'yakov, I. V.; Kaurova, N. S.; Voronov, B. M.; Anfert'ev, V. A.; Revin, L. S.; Vaks, V. L.; Gol'tsman, G. N. doi  openurl
  Title The influence of the diffusion cooling on the noise band of the superconductor NbN hot-electron bolometer operating in the terahertz range Type Journal Article
  Year 2016 Publication Tech. Phys. Lett. Abbreviated Journal  
  Volume (down) 42 Issue 6 Pages 563-566  
  Keywords HEB, noise bandwidth, conversion gain bandwidth, noise temperature, Andreev reflection  
  Abstract Results of an experimental study of the noise temperature (Tn) and noise bandwidth (NBW) of the superconductor NbN hot-electron bolometer (HEB) mixer as a function of its temperature (Tb) are presented. It was determined that the NBW of the mixer is significantly wider at temperatures close to the critical ones (Tc) than are values measured at 4.2 K. The NBW of the mixer measured at the heterodyne frequency of 2.5 THz at temperature Tb close to Tc was ~13 GHz, as compared with 6 GHz at Tb = 4.2 K. This experiment clearly demonstrates the limitation of the thermal flow from the NbN bridge at Tb â‰<aa> Tc for mixers manufactured by the in situ technique. This limitation is close in its nature to the Andreev reflection on the superconductor/ metal boundary. In this case, the noise temperature of the studied mixer increased from 1100 to 3800 K.  
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  Notes Approved no  
  Call Number Serial 1106  
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Author Hübers, H.-W.; Schubert, J.; Krabbe, A.; Birk, M.; Wagner, G.; Semenov, A.; Gol’tsman, G.; Voronov, B.; Gershenzon, E. url  doi
openurl 
  Title Parylene anti-reflection coating of a quasi-optical hot-electron-bolometric mixer at terahertz frequencies Type Journal Article
  Year 2001 Publication Infrared Physics & Technology Abbreviated Journal Infrared Physics & Technology  
  Volume (down) 42 Issue 1 Pages 41-47  
  Keywords NbN HEB mixers, anti-reflection coating  
  Abstract Parylene C was investigated as anti-reflection coating for silicon at terahertz frequencies. Measurements with a Fourier-transform spectrometer show that the transmittance of pure silicon can be improved by about 30% when applying a layer of Parylene C with a quarter wavelength optical thickness. The 10% bandwidth of this coating extends from 1.5 to 3 THz for a center frequency of 2.3–2.5 THz, where the transmittance is constant. Heterodyne measurements demonstrate that the noise temperature of a hot-electron-bolometric mixer can be reduced significantly by coating the silicon lens of the hybrid antenna with a quarter wavelength Parylene C layer. Compared to the same mixer with an uncoated lens the improvement is about 30% at a frequency of 2.5 THz.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1350-4495 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1548  
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Author Boyarskii, D. A.; Gershenzon, V. E.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsina, N. G.; Tikhonov, V. V.; Chulkova, G. M. url  openurl
  Title On the possibility of determining the microstructural parameters of an oil-bearing layer from radiophysical measurement data Type Journal Article
  Year 1996 Publication J. of Communications Technology and Electronics Abbreviated Journal J. of Communications Technology and Electronics  
  Volume (down) 41 Issue 5 Pages 408-414  
  Keywords submillimeter waves, transmission  
  Abstract A method for the reconstruction of microstructural properties of an oil-bearing rock from the spectral dependence of the transmission factor of submillimeter waves is proposed.  
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  ISSN 1064-2269 ISBN Medium  
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  Notes Радиотехника и электроника 41, no. 4 (1996): 441-447 Approved no  
  Call Number Serial 1611  
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Author Gol'tsman, G. N. url  doi
openurl 
  Title Hot electron bolometric mixers: new terahertz technology Type Journal Article
  Year 1999 Publication Infrared Physics & Technology Abbreviated Journal Infrared Physics & Technology  
  Volume (down) 40 Issue 3 Pages 199-206  
  Keywords NbN HEB mixers  
  Abstract This paper presents an overview of recent results for NbN phonon-cooled hot electron bolometric (HEB) mixers. The noise temperature of the receivers based on both quasioptical and waveguide versions of HEB mixers has crossed the level of 1 K GHz−1 at 430 GHz (410 K), 600–650 GHz (480 K), 750 GHz (600 K), 810 GHz (780 K) and is close to that level at 1.1 THz (1250 K) and 2.5 THz (4500 K). The gain bandwidth measured for quasioptical HEB mixer at 620 GHz reached 4 GHz and the noise temperature bandwidth was almost 8 GHz. Local oscillator power requirements are about 1 μW for mixers made by photolithography and about 100 nW for mixers made by e-beam lithography. A waveguide version of 800 GHz receiver was installed at the Submillimeter Telescope Observatory on Mt. Graham, AZ, to conduct astronomical observations of known submillimeter lines (CO, J=7→6, CI, J=2→1). It was proved that the receiver works as a practical instrument.  
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  Series Editor Series Title Abbreviated Series Title  
  Series Volume Series Issue Edition  
  ISSN 1350-4495 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1570  
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