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Author (up) Cherednichenko, S.; Ronnung, F.; Gol'tsman, G.; Gershenzon, E.; Winkler, D. url  openurl
  Title YBa2Cu3O7-δ hot-electron bolometer with submicron dimensions Type Conference Article
  Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 10th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 181-189  
  Keywords YBCO HTS HEB mixers  
  Abstract Photoresponse of YBa2Cu3O7-δ hot-electron bolometers to modulated near-infrared radiation was studied at a modulation .frequenc y var y ing from 0.2 MHz to 2 GHz. Bolometers were _fabricated from a 50 12 M thick film and had in-plane areas of 10x10 , um 2 . 2x0.2 s um', 1x0.2 p.m', and 0.5x0.2 jim. We found that nonequilibrium phonons cool down more effectively for the bolometers with smaller area. For the smallest bolometer the bolometric component in the response is 10 dB less than for the largest one.  
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  Call Number Serial 1572  
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Author (up) Galin, I.; Schnitzer, C. A.; Dengler, R. J.; Quintero, O. openurl 
  Title 177–207 GHz radiometer front end, single–side–band measurements Type Conference Article
  Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal  
  Volume Issue Pages 70  
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  Corporate Author Thesis  
  Publisher Place of Publication Charlottesville, Virginia, USA Editor  
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  Call Number RPLAB @ s @ schottky_Tn_1000_at_0p2THz Serial 289  
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Author (up) Gerecht, E.; Musante, C. F.; Jian, H.; Zhuang, Y.; Yngvesson, K. S.; Dickinson, J.; Goyette, T.; Waldman, J.; Yagoubov, P. A.; Gol'tsman, G. N.; Voronov, B. M.; Gershenzon, E. M. url  openurl
  Title Improved characteristics of NbN HEB mixers integrated with log-periodic antennas Type Conference Article
  Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 10th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 200-207  
  Keywords NbN HEB mixers  
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  Notes Approved no  
  Call Number Serial 1574  
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Author (up) Hesler, Jeffrey L.; Hui, Kai; Crowe, Thomas W. openurl 
  Title A fixed–tuned 400 GHz subharmonic mixer using planar Schottky diods Type Conference Article
  Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal  
  Volume Issue Pages 95  
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  Corporate Author Thesis  
  Publisher Place of Publication Charlottesville, Virginia, USA Editor  
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  Notes Approved no  
  Call Number RPLAB @ s @ schottky_Tn_1120_at_0p42THz Serial 291  
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Author (up) Il'in, K. S.; Gol'tsman, G. N.; Voronov, B. M.; Sobolewski, Roman url  openurl
  Title Characterization of the electron energy relaxation process in NbN hot-electron devices Type Conference Article
  Year 1999 Publication Proc. 10th Int. Symp. Space Terahertz Technol. Abbreviated Journal Proc. 10th Int. Symp. Space Terahertz Technol.  
  Volume Issue Pages 390-397  
  Keywords HEB mixers, SSPD, SNSPD, NbN films, Nb films  
  Abstract We report on transient measurements of electron energy relaxation in NbN films with 300-fs time resolution. Using an electro-optic sampling technique, we have studied the photoresponse of 3.5-nm-thick NbN films deposited on sapphire substrates and exposed to 100-fs-wide optical pulses. Our experimental data analysis was based on the two-temperature model and has shown that in our films at the superconducting transition 10.5 K the inelastic electron-phonon scattering time was about (111}+-__.2) ps. This response time indicated that the maximum intermediate-frequency band of a NbN hot-electron phonon-cooled mixer should reach (16+41-3) GHz if one eliminates the bolometric phonon-heating effect. We have suggested several ways to increase the effectiveness of phonon cooling to achieve the above intrinsic value of the NbN mixer bandwidth.  
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  Notes Approved no  
  Call Number Serial 1576  
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