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Author Meledin D.; Desmaris V.; Ferm S.-E.; Fredrixon M.; Henke D.; Lapkin I.; Nyström O.; Pantaleev M.; Pavolotsky A.; Strandberg M.; Sundin E.; Belitsky V. openurl 
  Title APEX Band T2: A 1.25 – 1.39 THz Waveguide Balanced HEB Receiver Type Journal Article
  Year 2008 Publication (up) Abbreviated Journal  
  Volume Issue Pages 181-185  
  Keywords  
  Abstract A waveguide 1.25–1.39 THz Hot Electron Bolometer (HEB) balanced receiver was successfully developed, characterized and installed at the Atacama Pathfinder EXperiment (APEX) telescope. The receiver employs a quadrature balanced scheme using a waveguide 90-degree 3 dB RF hybrid, HEB mixers and a 180-degree IF hybrid. The HEB mixers are based on ultrathin NbN film deposited on crystalline quartz with a MgO buffer layer. Integrated into the multi-channel APEX facility receiver (SHeFI), the results presented here demonstrate exceptional performance; a receiver noise temperature of 1000 K measured at the telescope at the center of the receiver IF band 2-4 GHz, and at an LO frequency of 1294 GHz. Stability of the receiver is fully in line with the SIS mixer bands of the SHeFI, and gives a spectroscopic Allan time of more than 200 s with a noise bandwidth of 1 MHz.  
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  Call Number RPLAB @ atomics90 @ Serial 974  
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Author Kozorezov, A. G.; Lambert, C.; Marsili, F.; Stevens, M. J.; Verma, V. B.; Stern, J. A.; Horansky, R.; Dyer, S.; Duff, S.; Pappas, D. P.; Lita, A.; Shaw, M. D.; Mirin, R. P.; Sae Woo Nam doi  openurl
  Title Quasiparticle recombination in hotspots in superconducting current-carrying nanowires Type Journal Article
  Year 2015 Publication (up) Abbreviated Journal Phys. Rev. B  
  Volume 92 Issue 6 Pages  
  Keywords  
  Abstract We describe a kinetic model of recombination of non-equilibrium quasiparticles generated by single photon absorption in superconducting current-carrying nanowires. The model is developed to interpret two-photon detection experiments in which a single photon does not possess sufficient energy for breaking superconductivity at a fixed low bias current. We show that quasiparticle self- recombination in relaxing hotspot dominates diffusion expansion effects and explains the observed strong bias current, wavelength and temperature dependencies of hotspot relaxation in tungsten silicide superconducting nanowire single-photon detectors.  
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  Language English Summary Language Original Title  
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  Notes Approved no  
  Call Number RPLAB @ alex_kazakov @ Serial 1003  
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Author Takesue, Hiroki; Dyer, Shellee D.; Stevens, Martin J.; Verma, Varun; Mirin, Richard P.; Nam, Sae Woo doi  openurl
  Title Quantum teleportation over 100 km of fiber using highly efficient superconducting nanowire single-photon detectors Type Journal Article
  Year 2015 Publication (up) Abbreviated Journal Optica  
  Volume 2 Issue Pages  
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  Abstract Quantum teleportation is an essential quantum operation by which we can transfer an unknown quantum state to a remote location with the help of quantum entanglement and classical communication. Since the first experimental demonstrations using photonic qubits and continuous variables, the distance of photonic quantum teleportation over free-space channels has continued to increase and has reached >100 km. On the other hand, quantum teleportation over optical fiber has been challenging, mainly because the multifold photon detection that inevitably accompanies quantum teleportation experi- ments has been very inefficient due to the relatively low de- tection efficiencies of typical telecom-band single-photon detectors. Here, we report on quantum teleportation over optical fiber using four high-detection-efficiency supercon- ducting nanowire single-photon detectors (SNSPDs). These SNSPDs make it possible to perform highly efficient multi- fold photon measurements, allowing us to confirm that the quantum states of input photons were successfully tele- ported over 100 km of fiber with an average fidelity of 83.7  2.0%.  
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  Notes Approved no  
  Call Number RPLAB @ alex_kazakov @ Serial 1004  
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Author Teich, M. C. openurl 
  Title Chapter 9. Coherent detection in the infrared Type Book Chapter
  Year 1970 Publication (up) Abbreviated Journal  
  Volume Issue Pages 361-407  
  Keywords minimum detectable power, photon counter, photon counting, quantum counting, quantum limit  
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  Publisher Academic Press Inc. Place of Publication NY Editor  
  Language Summary Language Original Title  
  Series Editor Series Title Semiconductors and semimetals Abbreviated Series Title  
  Series Volume 5 Series Issue Edition  
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  Notes Approved no  
  Call Number Serial 1059  
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Author Столяров, А. В. url  openurl
  Title Программирование. Введение в профессию. Примеры программ Type Miscellaneous
  Year 2017 Publication (up) Abbreviated Journal  
  Volume Issue Pages  
  Keywords programming, computer science  
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  Notes Approved no  
  Call Number Serial 1137  
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