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Author Tretyakov, I. V.; Ryabchun, S. A.; Maslennikov, S. N.; Finkel, M. I.; Kaurova, N. S.; Seleznev, V. A.; Voronov, B. M.; Gol'tsman, G.N. openurl 
  Title NbN HEB mixer: fabrication, noise temperature reduction and characterization Type Conference Article
  Year 2008 Publication Proc. Basic problems of superconductivity Abbreviated Journal  
  Volume Issue Pages  
  Keywords HEB, mixer, noise temperature, conversion gain bandwidth  
  Abstract We demonstrate that in the terahertz region superconducting hot-electron mixers offer the lowest noise temperature, opening the possibility of using HTS's in the future to fabricate these devices. Specifically, a noise temperature of 950 K was measured for the receiver operating at 2.5 THz with a NbN HEB mixer, and a gain bandwidth of 6 GHz was measured at 300 GHz near Tc for the same mixer.  
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  Publisher Place of Publication Moscow-Zvenigorod Editor  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 591  
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Author Финкель, М. И. pdf  openurl
  Title Терагерцовые смесители на эффекте электронного разогрева в ультратонких плёнках NbN и NbTiN Type Manuscript
  Year 2006 Publication М. МПГУ Abbreviated Journal  
  Volume Issue Pages  
  Keywords HEB, detector, mixer, terahertz, THz, infrared, IR, direct detection effect, conversion bandwidth, conversion loss  
  Abstract  
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  Corporate Author Thesis Ph.D. thesis  
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  Area Expedition Conference  
  Notes Approved no  
  Call Number Serial 597  
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Author Рябчун, С. А. pdf  openurl
  Title Широкополосные высокостабильные терагерцовые смесители на горячих электронах из тонких сверхпроводниковых пленок NbN Type Manuscript
  Year 2009 Publication М. МПГУ Abbreviated Journal  
  Volume Issue Pages 98  
  Keywords HEB, mixer, terahertz, THz, stability, Allan variance, conversion bandwidth, in-situ technique, Au contacts  
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  Corporate Author Thesis Ph.D. thesis  
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  Notes Approved no  
  Call Number Serial 598  
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Author Морозов, Дмитрий Владимирович pdf  openurl
  Title Приемные устройства терагерцового диапазона на эффекте разогрева двумерного электронного газа в гетероструктурах AlGaAs/GaAs Type Manuscript
  Year 2007 Publication М. МПГУ Abbreviated Journal  
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  Corporate Author Thesis Ph.D. thesis  
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  Notes Approved no  
  Call Number RPLAB @ s @ Serial 626  
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Author Feautrier, P.; le Coarer, E.; Espiau de Lamaestre, R.; Cavalier, P.; Maingault, L.; Villégier, J-C.; Frey, L.; Claudon, J.; Bergeard, N.; Tarkhov, M.; Poizat, J-P. openurl 
  Title High-speed superconducting single photon detectors for innovative astronomical applications Type Conference Article
  Year 2008 Publication J. Phys.: Conf. Ser. Abbreviated Journal J. Phys.: Conf. Ser.  
  Volume 97 Issue 1 Pages 10  
  Keywords SSPD  
  Abstract Superconducting Single Photon Detectors (SSPD) are now mature enough to provide extremely interesting detector performances in term of sensitivity, speed, and geometry in the visible and near infrared wavelengths. Taking advantage of recent results obtained in the Sinphonia project, the goal of our research is to demonstrate the feasibility of a new family of micro-spectrometers, called SWIFTS (Stationary Wave Integrated Fourier Transform Spectrometer), associated to an array of SSPD, the whole assembly being integrated on a monolithic sapphire substrate coupling the detectors array to a waveguide injecting the light. This unique association will create a major breakthrough in the domain of visible and infrared spectroscopy for all applications where the space and weight of the instrument is limited. SWIFTS is an innovative way to achieve very compact spectro-detectors using nano-detectors coupled to evanescent field of dielectric integrated optics. The system is sensitive to the interferogram inside the dielectric waveguide along the propagation path. Astronomical instruments will be the first application of such SSPD spectrometers. In this paper, we describes in details the fabrication process of our SSPD built at CEA/DRFMC using ultra-thin NbN epitaxial films deposited on different orientations of Sapphire substrates having state of the art superconducting characteristics. Electron beam lithography is routinely used for patterning the devices having line widths below 200 nm and down to 70 nm. An experimental set-up has been built and used to test these SSPD devices and evaluate their photon counting performances. Photon counting performances of our devices have been demonstrated with extremely low dark counts giving excellent signal to noise ratios. The extreme compactness of this concept is interesting for space spectroscopic applications. Some new astronomical applications of such concept are proposed in this paper.  
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  Notes Approved no  
  Call Number RPLAB @ gujma @ Serial 648  
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Author Korneev, Alexander; Korneeva, Yulia; Florya, Irina; Elezov, Michael; Manova, Nadezhda; Tarkhov, Michael; An, Pavel; Kardakova, Anna; Isupova, Anastasiya; Chulkova, Galina; Voronov, Boris openurl 
  Title Recent advances in superconducting NbN single-photon detector development Type Conference Article
  Year 2011 Publication Proc. SPIE Abbreviated Journal Proc. SPIE  
  Volume 8072 Issue Pages 807202 (1 to 10)  
  Keywords SSPD  
  Abstract Superconducting single-photon detector (SSPD) is a planar nanostructure patterned from 4-nm-thick NbN film deposited on sapphire substrate. The sensitive element of the SSPD is 100-nm-wide NbN strip. The device is operated at liquid helium temperature. Absorption of a photon leads to a local suppression of superconductivity producing subnanosecond-long voltage pulse. In infrared (at 1550 nm and longer wavelengths) SSPD outperforms avalanche photodiodes in terms of detection efficiency (DE), dark counts rate, maximum counting rate and timing jitter. Efficient single-mode fibre coupling of the SSPD enabled its usage in many applications ranging from single-photon sources research to quantum cryptography. Recently we managed to improve the SSPD performance and measured 25% detection efficiency at 1550 nm wavelength and dark counts rate of 10 s-1. We also improved photon-number resolving SSPD (PNR-SSPD) which realizes a spatial multiplexing of incident photons enabling resolving of up to 4 simultaneously absorbed photons. Another improvement is the increase of the photon absorption using a λ/4 microcavity integrated with the SSPD. And finally in our strive to increase the DE at longer wavelengths we fabricated SSPD with the strip almost twice narrower compared to the standard 100 nm and demonstrated that in middle infrared (about 3 μm wavelength) these devices have DE several times higher compared to the traditional SSPDs.  
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  Notes Approved no  
  Call Number RPLAB @ gujma @ Serial 663  
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Author Смирнов, Андрей Владимирович openurl 
  Title Исследование полосы преобразования терагерцовых смесителей на эффекте электронного разогрева в NbZr, NbN и в одиночном гетеропереходе AlGaAs/GaAs Type Manuscript
  Year 2009 Publication Радиофизика Abbreviated Journal Радиофиз.  
  Volume Issue Pages 139  
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  Notes Диссертация Approved no  
  Call Number RPLAB @ gujma @ Serial 718  
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Author Lobanov, Y. V.; Tong, Cheuk-Yu E.; Hedden, A. S.; Blundell, R.; Gol'tsman, G. N. openurl 
  Title Microwave-assisted슠measurement슠of the슠frequency슠response슠of슠terahertz슠HEB슠mixers슠with a슠fourier슠transform슠spectrometer Type Conference Article
  Year 2010 Publication 21st International Symposium on Space Terahertz Technology Abbreviated Journal 21st ISSTT  
  Volume Issue Pages 420-423  
  Keywords HEB mixer  
  Abstract We describe a novel method of operation of the HEB direct detector for use with a Fourier Transform Spectrometer. Instead of elevating the bath temperature, we have measured the RF response of waveguide HEB mixers by applying microwave radiation to select appropriate bias conditions. In our experiment, a microwave signal is injected into the HEB mixer via its IF port. By choosing an appropriate injection level, the device can be operated close to the desired operating point. Furthermore, we have shown that both thermal biasing and microwave injection can reproduce the same spectral response of the HEB mixer. However, with the use of microwave injection, there is no need to wait for the mixer to reach thermal equilibrium, so characterisation can be done in less time. Also, the liquid helium consumption for our wet cryostat is also reduced. We have demonstrated that the signalto-noise ratio of the FTS measurements can be improved with microwave injection.  
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  Notes Approved no  
  Call Number RPLAB @ gujma @ Serial 725  
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Author Shurakov, Alexander; Tong, Edward; Blundell, Raymond; Gol'tsman, Gregory openurl 
  Title Microwave stabilization of HEB mixer by a microchip controller Type Conference Article
  Year 2012 Publication IEEE MTT-S international microwave symposium digest Abbreviated Journal  
  Volume Issue Pages 1-3  
  Keywords HEB mixer stability, microwave injection, Allan variance, Allan time  
  Abstract The stability of a Hot Electron Bolometer (HEB) mixer can be improved by the use of microwave injection. In this article we report a refinement of this approach. We introduce a microchip controller to facilitate the implementation of the stabilization scheme, and demonstrate that the feedback loop effectively suppresses drifts in the HEB bias current, leading to an improvement in the receiver stability. The measured Allan time of the mixer's IF output power is increased to > 10 s.  
  Address Montreal, QC, Canada  
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  Notes Approved no  
  Call Number Serial 857  
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Author Корнеева, Ю. П.; Флоря, И. Н.; Корнеев, А. А.; Гольцман, Г. Н. isbn  openurl
  Title Cверхпроводящий однофотонный детектор для дальнего ИК диапазона длин волн Type Conference Article
  Year 2010 Publication Науч. сессия НИЯУ МИФИ Abbreviated Journal Науч. сессия НИЯУ МИФИ  
  Volume Issue Pages 46-47  
  Keywords SSPD  
  Abstract Мы представляем быстродействующий сверхпроводниковый однофотонный детектор (SSPD) для дальнего инфракрасного диапазона на основе ультратонкой монокристаллической пленки NbN толщиной 3 нм, состоящий из параллельных полосок. QE на длине волны 1,5.μм и 1,3 μм для предложенного SSPD практически одинаковы. SSPD показывает отклик длительностью 200 пс, что открывает путь к детекторам, обладающим скоростью счета свыше 1 ГГц.  
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  ISSN ISBN 978-5-7262-1227-2 Medium  
  Area Expedition Conference  
  Notes УДК 533.14(06)+004.056(06) Фотоника и информационная оптика Approved no  
  Call Number Serial 1144  
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