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Author Zinoni, C.; Alloing, B.; Li, L. H.; Marsili, F.; Fiore, A.; Lunghi, L.; Gerardino, A.; Vakhtomin, Y. B.; Smirnov, K. V.; Gol’tsman, G. N.
Title Single-photon experiments at telecommunication wavelengths using nanowire superconducting detectors Type Journal Article
Year 2007 Publication Appl. Phys. Lett. Abbreviated Journal Appl. Phys. Lett.
Volume (up) 91 Issue 3 Pages 031106 (1 to 3)
Keywords SSPD, SNSPD, APD
Abstract The authors report fiber-coupled superconducting single-photon detectors with specifications that exceed those of avalanche photodiodes, operating at telecommunication wavelength, in sensitivity, temporal resolution, and repetition frequency. The improved performance is demonstrated by measuring the intensity correlation function g(2)(τ) of single-photon states at 1300nm produced by single semiconductor quantum dots.

This work was supported by Swiss National Foundation through the “Professeur borsier” and NCCR Quantum Photonics program, FP6 STREP “SINPHONIA” (Contract No. NMP4-CT-2005-16433), IP “QAP” (Contract No. 15848), NOE “ePIXnet,” and the Italian MIUR-FIRB program.
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ISSN 0003-6951 ISBN Medium
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Notes Erratum: 1395 Approved no
Call Number Serial 1396
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Author Ejrnaes, M.; Cristiano, R.; Quaranta, O.; Pagano, S.; Gaggero, A.; Mattioli, F.; Leoni, R.; Voronov, B.; Gol’tsman, G.
Title A cascade switching superconducting single photon detector Type Journal Article
Year 2007 Publication Appl. Phys. Lett. Abbreviated Journal Appl. Phys. Lett.
Volume (up) 91 Issue 26 Pages 262509 (1 to 3)
Keywords SSPD, SNSPD, parallel-wire
Abstract We have realized superconducting single photon detectors with reduced inductance and increased signal pulse amplitude. The detectors are based on a parallel connection of ultrathin NbN nanowires with a common bias inductance. When properly biased, an absorbed photon induces a cascade switch of all the parallel wires generating a signal pulse amplitude of 2mV. The parallel wire configuration lowers the detector inductance and reduces the response time well below 1ns.

This work was performed in the framework of the EU project “SINPHONIA” NMP4-CT-2005-016433.
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Notes Approved no
Call Number Serial 1418
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Author Gao, J. R.; Hajenius, M.; Tichelaar, F. D.; Klapwijk, T. M.; Voronov, B.; Grishin, E.; Gol’tsman, G.; Zorman, C. A.; Mehregany, M.
Title Monocrystalline NbN nanofilms on a 3C-SiC∕Si substrate Type Journal Article
Year 2007 Publication Appl. Phys. Lett. Abbreviated Journal Appl. Phys. Lett.
Volume (up) 91 Issue 6 Pages 062504 (1 to 3)
Keywords NbN films, nanofilms
Abstract The authors have realized NbN (100) nanofilms on a 3C-SiC (100)/Si(100) substrate by dc reactive magnetron sputtering at 800°C. High-resolution transmission electron microscopy (HRTEM) is used to characterize the films, showing a monocrystalline structure and confirming epitaxial growth on the 3C-SiC layer. A film ranging in thickness from 3.4to4.1nm shows a superconducting transition temperature of 11.8K, which is the highest reported for NbN films of comparable thickness. The NbN nano-films on 3C-SiC offer a promising alternative to improve terahertz detectors. For comparison, NbN nanofilms grown directly on Si substrates are also studied by HRTEM.

The authors acknowledge S. V. Svetchnikov at National Centre for HRTEM at Delft, who prepared the specimens for HRTEM inspections. This work was supported by the EU through RadioNet and INTAS.
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Notes Approved no
Call Number Serial 1425
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Author Tarkhov, M.; Claudon, J.; Poizat, J. Ph.; Korneev, A.; Divochiy, A.; Minaeva, O.; Seleznev, V.; Kaurova, N.; Voronov, B.; Semenov, A. V.; Gol'tsman, G.
Title Ultrafast reset time of superconducting single photon detectors Type Journal Article
Year 2008 Publication Appl. Phys. Lett. Abbreviated Journal Appl. Phys. Lett.
Volume (up) 92 Issue 24 Pages 241112 (1 to 3)
Keywords SSPD, SNSPD
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Notes Approved no
Call Number Serial 429
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Author Li, T. F.; Pashkin, Yu. A.; Astafiev, O.; Nakamura, Y.; Tsai, J. S.; Im, H.
Title High-frequency metallic nanomechanical resonators Type Journal Article
Year 2008 Publication Appl. Phys. Lett. Abbreviated Journal Appl. Phys. Lett.
Volume (up) 92 Issue Pages 043112(1)-043112(3)
Keywords nanomechanical resonator, polycrystalline metal films
Abstract We developed a technology to fabricate fully metallic doubly clamped beams working as nanomechanical resonators. Measured with a magnetomotive detection scheme, the beams, made of polycrystalline metal films, show as good quality as previously reported ones made of single crystal materials, such as Si, GaAs, AlN, and SiC. Our method is compatible with the conventional fabrication process for nanoscale electronic circuits and thus offers a possibility of easily integrating the beams into superconducting charge and flux qubits and single-electron transistors as well as coupling them to coplanar waveguide resonators.
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Notes Approved no
Call Number Serial 621
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