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Improvement of SNSPD Detection Efficiency by Variation of NbN Chemical Composition

Rall, D. and Toussaint, J. and Hofherr, M. and Wünsch, S. and Il’in, K. and Semenov, A. and Hübers, H.-W. and Lemmer, U. and Siegel, M. (2010) Improvement of SNSPD Detection Efficiency by Variation of NbN Chemical Composition. In: Tagungsband, p. 50. DLR. Kryo 2010, 03.-05.10.2010, Zeuthen, Brandenburg.

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Abstract

Ever since it has been shown that two-dimensionally constricted superconductors can be used to detect single photons, effort has been invested to optimize such devices for applications. In most cases, the detection efficiency, defining the ratio of counted photons vs. incoming photons and hence the sensitivity of the device, is the most important parameter. However, depending on the applications, other parameters, like the absolute pulse strength or the dark count rate, might be important to adjust. Principally, such a superconducting nanowire single photon detector (SNSPD) consists of a very thin superconducting film, which is patterned into a narrow meandering line. To tune the properties of such devices, the optimization of the geometry and layout of such structures has already been the topic of several investigations within our group [1], [2]. However, the device performance can also be influenced by changing the material properties of the superconducting thin film which provides the basis of the SNSPD.

Document Type:Conference or Workshop Item (Poster)
Title:Improvement of SNSPD Detection Efficiency by Variation of NbN Chemical Composition
Authors:
AuthorsInstitution or Email of Authors
Rall, D.Lichttechnisches Institut, Karlsruher Institut für Technologie, Engesserstrasse 13, 76131 Karlsruhe
Toussaint, J.Lichttechnisches Institut, Karlsruher Institut für Technologie, Engesserstrasse 13, 76131 Karlsruhe
Hofherr, M.Institut für Mikro- und Nanoelektronische Systeme, Karlsruher Institut für Technologie, Hertzstr. 16, 76187 Karlsruhe
Wünsch, S.Institut für Mikro- und Nanoelektronische Systeme, Karlsruher Institut für Technologie, Hertzstr. 16, 76187 Karlsruhe
Il’in, K.Institut für Mikro- und Nanoelektronische Systeme, Karlsruher Institut für Technologie, Hertzstr. 16, 76187 Karlsruhe
Semenov, A.Alexei.Semenov@dlr.de
Hübers, H.-W.heinz-wilhelm.huebers@dlr.de
Lemmer, U.Lichttechnisches Institut, Karlsruher Institut für Technologie, Engesserstrasse 13, 76131 Karlsruhe
Siegel, M.Institut für Mikro- und Nanoelektronische Systeme, Karlsruher Institut für Technologie, Hertzstr. 16, 76187 Karlsruhe
Date:October 2010
Journal or Publication Title:Tagungsband
Page Range:p. 50
Publisher:DLR
Status:Published
Keywords:Improvement of SNSPD Detection Efficiency by Variation of NbN Chemical Composition, constricted superconductors, detect single photons, absolute pulse strength, dark count rate, nanowire single photon, basis of the SNSPD
Event Title:Kryo 2010
Event Location:Zeuthen, Brandenburg
Event Type:national Conference
Event Dates:03.-05.10.2010
Organizer:DLR, Prof. Hübers
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Transport
HGF - Program Themes:Traffic Management
DLR - Research area:Transport
DLR - Program:V VM - Verkehrsmanagement
DLR - Research theme (Project):V - FAMOUS (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Terahertz and Infrared Sensors
Deposited By: Ulrike Stiebeler
Deposited On:04 Jan 2011 17:28
Last Modified:04 Jan 2011 17:28

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