Semenov, Alexey and Haas, Philipp and Hübers, Heinz-Wilhelm and Ilin, Konstantin and Siegel, Michael and Kirste, Alexander and Schurig, Thomas and Herrmann, Rudolf (2008) Improved energy resolution of a superconducting single-photon detector. SPIE. High Energy, Optical, and Infrared Detectors for Astronomy III, 2008-06-23, Marseille (France).
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Official URL: http://dx.doi.org/10.1117/12.789351
We demonstrated successful operation of an NbN single photon detector in the temperature range from 6 K to 1.2 K using a <sup>3</sup>He sorption refrigerator combined with a pulse-tube mechanical cooler. The detector was read out either by microwave amplifiers or by a broadband SQUID-amplifier that limited the maximum counting rate to 107 counts per second. This counting rate was only one third of the maximum rate provided by the detector. Besides an increase in the quantum efficiency in the visible and near-infrared spectral range with the decrease of the operation temperature, we found a more than twofold improvement in the energy resolution as compared to earlier demonstrated 1 eV at 6.5 K. The noise equivalent power estimated at 4.2 K for visible light was better than 10<sup>-18</sup> W Hz<sup>1/2</sup>. We verified that the lowest achieved dark count rate was still caused by the harsh electrical conditions in the mechanical cooler.
|Document Type:||Conference or Workshop Item (Speech)|
|Title:||Improved energy resolution of a superconducting single-photon detector|
|In ISI Web of Science:||No|
|Number of Pages:||7|
|Series Name:||Proceedings of SPIE|
|Keywords:||Superconducting single-photon detector, visible and near-infrared spectral range, energy resolution|
|Event Title:||High Energy, Optical, and Infrared Detectors for Astronomy III|
|Event Location:||Marseille (France)|
|Event Type:||international Conference|
|HGF - Research field:||Aeronautics, Space and Transport (old)|
|HGF - Program:||Space (old)|
|HGF - Program Themes:||W EW - Erforschung des Weltraums|
|DLR - Research area:||Space|
|DLR - Program:||W EW - Erforschung des Weltraums|
|DLR - Research theme (Project):||W - Vorhaben IR-Astronomie (old)|
|Institutes and Institutions:||Institute of Planetary Research > Terahertz and Infrared Sensors|
|Deposited By:||Prof.Dr. Alexey Semenov|
|Deposited On:||15 Dec 2008|
|Last Modified:||27 Apr 2009 15:33|
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