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Author Loudkov, D.; Tong, C. Y. E.; Blundell, R.; Kaurova, N.; Grishina, E.; Voronov, B.; Gol'tsman, G. openurl 
  Title An investigation of the performance of the superconducting HEB슠mixer as a function of its RF슠embedding impedance Type Journal Article
  Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 15 Issue 2 Pages 472-475  
  Keywords HEB mixer  
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  Corporate Author Thesis  
  Publisher IEEE Place of Publication Editor  
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  Notes Approved no  
  Call Number Serial 371  
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Author Torgashin, M. Yu.; Koshelets, V. P.; Dmitriev, P. N.; Ermakov, A. B.; Filippenko, L. V.; Yagoubov, P. A. openurl 
  Title Superconducting integrated receivers based on Nb-AlN-NbN circuits Type Journal Article
  Year 2007 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 17 Issue 2 Pages 379-382  
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  Notes Approved no  
  Call Number RPLAB @ s @ mix_SIR_ieee_trans_2007 Serial 406  
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Author Hans Ekstrom; Karasik, Boris S.; Kollberg, Erik L.; Sigfrid Yngvesson openurl 
  Title Conversion gain and noise of niobium superconducting hot–electron–mixers Type Journal Article
  Year 1995 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 43 Issue 4 Pages 938-947  
  Keywords Nb HEB mixers  
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  Notes Approved no  
  Call Number Serial 254  
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Author Sobolewski, R.; Verevkin, A.; Gol'tsman, G.N.; Lipatov, A.; Wilsher, K. url  doi
openurl 
  Title Ultrafast superconducting single-photon optical detectors and their applications Type Journal Article
  Year 2003 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 13 Issue 2 Pages 1151-1157  
  Keywords NbN SSPD, SNSPD  
  Abstract We present a new class of ultrafast single-photon detectors for counting both visible and infrared photons. The detection mechanism is based on photon-induced hotspot formation, which forces the supercurrent redistribution and leads to the appearance of a transient resistive barrier across an ultrathin, submicrometer-width, superconducting stripe. The devices were fabricated from 3.5-nm- and 10-nm-thick NbN films, patterned into <200-nm-wide stripes in the 4 /spl times/ 4-/spl mu/m/sup 2/ or 10 /spl times/ 10-/spl mu/m/sup 2/ meander-type geometry, and operated at 4.2 K, well below the NbN critical temperature (T/sub c/=10-11 K). Continuous-wave and pulsed-laser optical sources in the 400-nm-to 3500-nm-wavelength range were used to determine the detector performance in the photon-counting mode. Experimental quantum efficiency was found to exponentially depend on the photon wavelength, and for our best, 3.5-nm-thick, 100-/spl mu/m/sup 2/-area devices varied from >10% for 405-nm radiation to 3.5% for 1550-nm photons. The detector response time and jitter were /spl sim/100 ps and 35 ps, respectively, and were acquisition system limited. The dark counts were below 0.01 per second at optimal biasing. In terms of the counting rate, jitter, and dark counts, the NbN single-photon detectors significantly outperform their semiconductor counterparts. Already-identified applications for our devices range from noncontact testing of semiconductor CMOS VLSI circuits to free-space quantum cryptography and communications.  
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  ISSN 1051-8223 ISBN Medium  
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  Notes Approved no  
  Call Number Serial 509  
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Author Karpov, A.; Blondel, J.; Voss, M.; Gundlach, K. H. openurl 
  Title A three photon noise SIS heterodyne receiver at submillimeter wavelength Type Journal Article
  Year 1999 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 9 Issue 2 Pages 4456-4459  
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  Notes Approved no  
  Call Number RPLAB @ s @ sis_Karpov_1999 Serial 300  
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Author Shitov, S. V.; Levitchev, M.; Veretennikov, A. V.; Koshelets, V. P.; Prokopenko, G. V.; Filippenko, L. V.; Ermakov, A. B.; Shtanyuk, A. M.; Kohlstedt, H.; Ustinov, A. V. openurl 
  Title Superconducting integrated receiver as 400-600 GHz tester for coolable devices Type Journal Article
  Year 2001 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 11 Issue 1 Pages 832-835  
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  Notes Approved no  
  Call Number RPLAB @ s @ sis_Shitov_2001 Serial 313  
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Author Semenov, A. D.; Hübers, Heinz-Wilhelm; Richter, H.; Birk, M.; Krocka, M.; Mair, U.; Vachtomin, Yu. B.; Finkel, M. I.; Antipov, S. V.; Voronov, B. M.; Smirnov, K. V.; Kaurova, N. S.; Drakinski, V. N.; Gol'tsman, G. N. doi  openurl
  Title Superconducting hot-electron bolometer mixer for terahertz heterodyne receivers Type Journal Article
  Year 2003 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 13 Issue 2 Pages 168-171  
  Keywords NbN HEB mixers  
  Abstract We present recent results showing the development of superconducting NbN hot-electron bolometer mixer for German receiver for astronomy at terahertz frequencies and terahertz limb sounder. The mixer is incorporated into a planar feed antenna, which has either logarithmic spiral or double-slot configuration, and backed on a silicon lens. The hybrid antenna had almost frequency independent and symmetric radiation pattern slightly broader than expected for a diffraction limited antenna. At 2.5 THz the best 2200 K double side-band receiver noise temperature was achieved across a 1 GHz intermediate frequency bandwidth centred at 1.5 GHz. For this operation regime, a receiver conversion efficiency of -17 dB was directly measured and the loss budget was evaluated. The mixer response was linear at load temperatures smaller than 400 K. Implementation of the MgO buffer layer on Si resulted in an increased 5.2 GHz gain bandwidth. The receiver was tested in the laboratory environment by measuring a methanol emission line at 2.5 THz.  
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  Notes Approved no  
  Call Number Serial 343  
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Author Datesman, A.M.; Schultz, J.C.; Lichtenberger, A.W.; Golish, D.; Walker, C.K.; Kooi, J. url  doi
openurl 
  Title Fabrication and characterization of niobium diffusion-cooled hot-electron bolometers on silicon nitride membranes Type Journal Article
  Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 15 Issue 2 Pages 928-931  
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  ISSN 1051-8223 ISBN Medium  
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  Notes Approved no  
  Call Number Serial 439  
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Author Koshelets, V.P.; Dmitriev, P.N.; Ermakov, A.B.; Sobolev, A.S.; Torgashin, M.Y.; Kurin, V.V.; Pankratov, A.L.; Mygind, J. url  doi
openurl 
  Title Optimization of the phase-locked flux-flow oscillator for the submm integrated receiver Type Journal Article
  Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 15 Issue 2 Pages 964-967  
  Keywords SIR  
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  ISSN 1051-8223 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 515  
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Author Koshelets, V. P.; Shitov, S. V.; Ermakov, A. B.; Filippenko, L. V.; Koryukin, O. V.; Khudchenko, A. V.; Torgashin, M. Yu.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Pylypenko, O. M. url  doi
openurl 
  Title Superconducting integrated receiver for TELIS Type Journal Article
  Year 2005 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 15 Issue 2 Pages 960-963  
  Keywords SIR  
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  ISSN 1051-8223 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 517  
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Author Koshelets, V. P.; Ermakov, A. B.; Filippenko, L. V.; Khudchenko, A. V.; Kiselev, O. S.; Sobolev, A. S.; Torgashin, M. Y.; Yagoubov, P. A.; Hoogeveen, R. W. M.; Wild, W. url  doi
openurl 
  Title Superconducting integrated submillimeter receiver for TELIS Type Journal Article
  Year 2007 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 17 Issue 2 Pages 336-342  
  Keywords SIR  
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  ISSN 1051-8223 ISBN Medium  
  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 524  
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Author Torgashin, Mikhail Yu.; Koshelets, Valery P.; Dmitriev, Pavel N.; Ermakov, Andrey B.; Filippenko, Lyudmila V.; Yagoubov, Pavel A. url  doi
openurl 
  Title Superconducting Integrated Receiver Based on Nb-AlN-NbN-Nb Circuits Type Journal Article
  Year 2007 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 17 Issue 2 Pages 379-382  
  Keywords SIR  
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  ISSN 1051-8223 ISBN Medium  
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  Notes Approved no  
  Call Number Serial 525  
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Author Gao, J. R.; Hajenius, M.; Yang, Z. Q.; Baselmans, J. J. A.; Khosropanah, P.; Barends, R.; Klapwijk, T. M. url  doi
openurl 
  Title Terahertz superconducting hot electron bolometer heterodyne receivers Type Journal Article
  Year 2007 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 17 Issue 2 Pages 252-258  
  Keywords HEB, mixer, direct detection effect  
  Abstract We highlight the progress on NbN hot electron bolometer (HEB) mixers achieved through fruitful collaboration between SRON Netherlands Institute for Space Research and Delft University of Technology, the Netherlands. This includes the best receiver noise temperatures of 700 K at 1.63 THz using a twin-slot antenna mixer and 1050 K at 2.84 THz using a spiral antenna coupled HEB mixer. The mixers are based on thin NbN films on Si and fabricated with a new contact-process and-structure. By reducing their areas HEB mixers have shown an LO power requirement as low as 30 nW. Those small HEB mixers have demonstrated equivalent sensitivity as those with large areas provided the direct detection effect due to broadband radiation is removed. To manifest that a HEB based heterodyne receiver can in practice be used at arbitrary frequencies above 2 THz, we demonstrate a 2.8 THz receiver using a THz quantum cascade laser (QCL) as local oscillator.  
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  Notes Approved no  
  Call Number RPLAB @ asmirn @ Serial 557  
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Author Yang, J. K. W.; Kerman, A. J.; Dauler, E. A.; Anant, V.; Rosfjord, K. M.; Berggren, K. K. openurl 
  Title Modeling the electrical and thermal response of superconducting nanowire single-photon detectors Type Journal Article
  Year 2007 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 17 Issue 2 Pages 581 - 585  
  Keywords SSPD, modeling  
  Abstract We modeled the response of superconducting nanowire single-photon detectors during a photodetection event, taking into consideration only the thermal and electrical properties of a superconducting NbN nanowire on a sapphire substrate. Our calculations suggest that heating which occurs after the formation of a photo-induced resistive barrier is responsible for the generation of a measurable voltage pulse. We compared this numerical result with experimental data of a voltage pulse from a slow device, i.e. large kinetic inductance, and obtained a good fit. Using this electro-thermal model, we estimated the temperature rise and the resistance buildup in the nanowire, and the return current at which the nanowire becomes superconducting again. We also show that the reset time of these photodetectors can be decreased by the addition of a series resistance and provide supporting experimental data. Finally we present preliminary results on a detector latching behavior that can also be explained using the electro-thermal model.  
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  Notes Approved no  
  Call Number Serial 625  
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Author Xiaolong Hu; Holzwarth, C.W.; Masciarelli, D.; Dauler, E.A.; Berggren, K.K. openurl 
  Title Efficiently coupling light to superconducting nanowire single-photon detectors Type Journal Article
  Year 2009 Publication IEEE Trans. Appl. Supercond. Abbreviated Journal (up)  
  Volume 19 Issue 3 Pages 336-340  
  Keywords optical antennas; SNSPD  
  Abstract We designed superconducting nanowire single-photon detectors (SNSPDs) integrated with silver optical antennae for free-space coupling and a dielectric waveguide for fiber coupling. According to our finite-element simulation, (1) for the free-space coupling, the absorptance of the NbN nanowire for TM-polarized photons at the wavelength of 1550 nm can be as high as 96% by adding silver optical antennae; (2) for the fiber coupling, the absorptance of the NbN nanowire for TE-like-polarized photons can reach 76% including coupling efficiency at the wavelength of 1550 nm by adding a silicon nitride waveguide and an inverse-taper coupler.  
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  Notes Approved no  
  Call Number RPLAB @ gujma @ Serial 647  
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