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Author Dauler, Eric; Kerman, Andrew; Robinson, Bryan; Yang, Joel; Voronov, Boris; Goltsman, Gregory; Hamilton, Scott; Berggren, Karl url  doi
openurl 
  Title (up) Photon-number-resolution with sub-30-ps timing using multi-element superconducting nanowire single photon detectors Type Journal Article
  Year 2009 Publication J. Modern Opt. Abbreviated Journal J. Modern Opt.  
  Volume 56 Issue 2 Pages 364-373  
  Keywords PNR SSPD; SNSPD; photon-number-resolution; superconducting nanowire single photon detector; timing jitter; system detection efficiency  
  Abstract A photon-number-resolving detector based on a four-element superconducting nanowire single photon detector is demonstrated to have sub-30-ps resolution in measuring the arrival time of individual photons. This detector can be used to characterize the photon statistics of non-pulsed light sources and to mitigate dead-time effects in high-speed photon counting applications. Furthermore, a 25% system detection efficiency at 1550 nm was demonstrated, making the detector useful for both low-flux source characterization and high-speed photon-counting and quantum communication applications. The design, fabrication and testing of this detector are described, and a comparison between the measured and theoretical performance is presented.  
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  Call Number RPLAB @ gujma @ Serial 700  
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Author Zolotov, P.; Divochiy, A.; Vakhtomin, Y.; Moshkova, M.; Morozov, P.; Seleznev, V.; Smirnov, K. url  doi
openurl 
  Title (up) Photon-number-resolving SSPDs with system detection efficiency over 50% at telecom range Type Conference Article
  Year 2018 Publication Proc. AIP Conf. Abbreviated Journal  
  Volume 1936 Issue 1 Pages 020019  
  Keywords NbN PNR SSPD, SNSPD  
  Abstract We used technology of making high-efficiency superconducting single-photon detectors as a basis for improvement of photon-number-resolving devices. By adding optical cavity and using an improved NbN superconducting film, we enhanced previously reported system detection efficiency at telecom range for such detectors. Our results show that implementation of optical cavity helps to develop four-section device with quantum efficiency over 50% at 1.55 µm. Performed experimental studies of detecting multi-photon optical pulses showed irregularities over defining multi-photon through single-photon quantum efficiency.  
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  Notes Approved no  
  Call Number doi:10.1063/1.5025457 Serial 1231  
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Author Korneev, Alexander; Golt'sman, Gregory; Pernice, Wolfram url  openurl
  Title (up) Photonic integration meets single-photon detection Type Miscellaneous
  Year 2015 Publication Laser Focus World Abbreviated Journal Laser Focus World  
  Volume 51 Issue 5 Pages 47-50  
  Keywords optical waveguide SSPD, SNSPD  
  Abstract By embedding superconducting nanowire single-photon detectors (SNSPDs) in nanophotonic circuits, these waveguide-integrated detectors are a key building block for future on-chip quantum computing applications.  
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  Notes Approved no  
  Call Number RPLAB @ akorneev @ Serial 1126  
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Author Manus, M. K. Mc; Kash, J. A.; Steen, S. E.; Polonsky, S.; Tsang, J.C.; Knebel, D. R.; Huott, W. doi  openurl
  Title (up) PICA: Backside failure analysis of CMOS circuits using picosecond imaging circuit analysis Type Journal Article
  Year 2000 Publication Microelectronics Reliability Abbreviated Journal Microelectronics Reliability  
  Volume 40 Issue Pages 1353-1358  
  Keywords SSPD, CMOS testing  
  Abstract Normal operation of complementary metal-oxide semiconductor (CMOS) devices entails the emission of picosecond pulses of light, which can be used to diagnose circuit problems. The pulses that are observed from submicron sized field effect transistors (FETs) are synchronous with logic state switching. Picosecond Imaging Circuit Analysis (PICA), a new optical imaging technique combining imaging with timing, spatially resolves individual devices at the 0.5 micron level and switching events on a 10 picosecond timescale. PICA is used here for the diagnostics of failures on two VLSI microprocessors.  
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  Notes Approved no  
  Call Number Serial 1054  
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Author Lindgren, M.; Currie, M.; Zeng, W.-S.; Sobolewski, R.; Cherednichenko, S.; Voronov, B.; Gol'tsman, G. N. url  doi
openurl 
  Title (up) Picosecond response of a superconducting hot-electron NbN photodetector Type Journal Article
  Year 1998 Publication Appl. Supercond. Abbreviated Journal Appl. Supercond.  
  Volume 6 Issue 7-9 Pages 423-428  
  Keywords NbN SSPD, SNSPD  
  Abstract The ps optical response of ultrathin NbN photodetectors has been studied by electro-optic sampling. The detectors were fabricated by patterning ultrathin (3.5 nm thick) NbN films deposited on sapphire by reactive magnetron sputtering into either a 5×10 μm2 microbridge or 25 1 μm wide, 5 μm long strips connected in parallel. Both structures were placed at the center of a 4 mm long coplanar waveguide covered with Ti/Au. The photoresponse was studied at temperatures ranging from 2.15 K to 10 K, with the samples biased in the resistive (switched) state and illuminated with 100 fs wide laser pulses at 395 nm wavelength. At T=2.15 K, we obtained an approximately 100 ps wide transient, which corresponds to a NbN detector response time of 45 ps. The photoresponse can be attributed to the nonequilibrium electron heating effect, where the incident radiation increases the temperature of the electron subsystem, while the phonons act as the heat sink. The high-speed response of NbN devices makes them an excellent choice for an optoelectronic interface for superconducting digital circuits, as well as mixers for the terahertz regime. The multiple-strip detector showed a linear dependence on input optical power and a responsivity =3.9 V/W.  
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  ISSN 0964-1807 ISBN Medium  
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  Notes Approved no  
  Call Number Serial 1584  
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