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Author Tretyakov, Ivan; Kaurova, N.; Voronov, B. M.; Goltsman, G. N. url  openurl
  Title (up) About effect of the temperature operating conditions on the noise temperature and noise bandwidth of the terahertz range NbN hot-electron bolometers Type Abstract
  Year 2018 Publication Proc. 29th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 29th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 113  
  Keywords NbN HEB mixer  
  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) and NbN bridge length 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 ≪ 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 1313  
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Author Gershenzon, E. M.; Orlov, L. A.; Ptitsina, N. G. url  openurl
  Title (up) Absorption spectra in electron transitions between excited states of impurities in germanium Type Journal Article
  Year 1975 Publication JETP Lett. Abbreviated Journal JETP Lett.  
  Volume 22 Issue 4 Pages 95-97  
  Keywords Ge, impurities, excited states, absorption spectra  
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  Notes Approved no  
  Call Number Serial 1773  
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Author Varyukhin, S. V.; Zakharov, A. A.; Gershenzon, E. M.; Gol'tsman, G. N.; Ptitsyna, N. G.; Chulkova, G. M. url  doi
openurl 
  Title (up) AC losses and submillimeter absorption in single crystals La2CuO4 Type Journal Article
  Year 1990 Publication Phys. B Condens. Mat. Abbreviated Journal Phys. B Condens. Mat.  
  Volume 165-166 Issue Pages 1269-1270  
  Keywords metal-dielectric-La2Cu04  
  Abstract The La2CuO4 single crystals were used to carry out the measurements of transmission spectra within the submillimeter range of wavelengths, as well as the capacitance C and conductivity G in the region of acoustic frequencies of the metal-dielectric-La2Cu04 system at low temperatures. The optical spectra display a threshold character. There takes place a sharp decreasing of transmission signal in the energy range of hυ>1.5meV. The C(ω,T) and G(ω,T) dependences have a universal form characteristic of relaxation processes of the Debye type. The relaxation time dependence displays a thermoactivation character τ(T)-exp(ξ/T) with a gap value of ξ≃2meV,coinciding with the optical one. It is assumed that there exist excitations with a characteristic energy ~ 2meV in La2Cu04.A possible nature of the revealed low-energy excitations is discussed.  
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  Series Volume Series Issue Edition  
  ISSN 0921-4526 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1686  
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Author Dauler, E. A.; Kerman, A. J.; Robinson, B. S.; Yang, J. K. W.; Voronov, B. M.; Gol’tsman, G. N.; Berggren, K. K. url  doi
openurl 
  Title (up) Achieving high counting rates in superconducting nanowire single-photon detectors Type Conference Article
  Year 2006 Publication CLEO/QELS Abbreviated Journal CLEO/QELS  
  Volume Issue Pages JTuD3 (1 to 2)  
  Keywords SSPD; SNSPD; Detectors; Photodetectors; Quantum optics; Quantum detectors; Photon counting; Photons; Pulse shaping; Quantum communications; Single photon detectors; Superconductors  
  Abstract Kinetic inductance is determined to be the primary limitation to the counting rate of superconducting nanowire single-photon counters. Approaches for overcoming this limitation will be discussed.  
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  Publisher Optical Society of America Place of Publication Editor  
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  Area Expedition Conference Conference on Lasers and Electro-Optics/Quantum Electronics and Laser Science Conference and Photonic Applications Systems Technologies  
  Notes Approved no  
  Call Number Serial 1451  
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Author Elezov, M. S.; Scherbatenko, M. L.; Sych, D. V.; Goltsman, G. N. url  doi
openurl 
  Title (up) Active and passive phase stabilization for the all-fiber Michelson interferometer Type Conference Article
  Year 2018 Publication J. Phys.: Conf. Ser. Abbreviated Journal J. Phys.: Conf. Ser.  
  Volume 1124 Issue Pages 051014 (1 to 5)  
  Keywords Michelson interferometer, phase stabilization  
  Abstract We put forward two methods for phase stabilization in the all-fiber Michelson interferometer. To perform passive phase stabilization, we use a heat bath for all fibers and electro-optical components, and put the interferometer in a hermetic case. To perform active phase stabilization, we monitor output power of the interferometer and develop an electronic feedback control. The phase stabilization methods enable stable interference pattern for several minutes, and can be helpful for the development of the optimal quantum receiver for coherent signals.  
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  ISSN 1742-6588 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 1299  
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