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Intrinsic detection efficiency of superconducting nanowire single-photon detectors with different thicknesses

Hofherr, Mattias and Rall, Dagmar and Ilin, Konstantin and Siegel, Michael and Semenov, Alexej and Hübers, H.-W. and Gippius, Nikolay (2010) Intrinsic detection efficiency of superconducting nanowire single-photon detectors with different thicknesses. Journal of Applied Physics, 108 (014507). DOI: 10.1063/1.3437043.

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Abstract

We evaluate experimentally the intrinsic detection efficiency IDE of superconducting NbN nanowire single-photon detectors in the range of wire thicknesses from 4 to 12 nm. The study is performed in the broad spectral interval between near-ultraviolet wavelength 400 nm and near-infrared wavelength 2000 nm light with plane waves at normal incidence. For visible light the IDE of the thinnest detectors reaches 70%. We use numerically computed absorptance of the nanowire-structures for the analysis of the experimental data. Variations in the detection efficiency with both the wire thickness and the wavelength evidence the red boundary of the hot-spot photon-detection mechanism. We explain the detection at larger wavelengths invoking thermal excitation of magnetic Pearl vortices over the potential barrier at the edges of the wire.

Document Type:Article
Title:Intrinsic detection efficiency of superconducting nanowire single-photon detectors with different thicknesses
Authors:
AuthorsInstitution or Email of Authors
Hofherr, MattiasKIT
Rall, DagmarKIT
Ilin, KonstantinUniversity of Karlsruhe
Siegel, MichaelUniversität Karlsruhe
Semenov, Alexejalexei.semenov@dlr.de
Hübers, H.-W.heinz-wilhelm.huebers@dlr.de
Gippius, NikolayUniversité Blaise Pascal, Aubiere, France
Date:2010
Journal or Publication Title:Journal of Applied Physics
Refereed publication:Yes
In Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:108
DOI:10.1063/1.3437043
Status:Published
Keywords:Superconducting nanowiers, photon detection, Pearl vortices
HGF - Research field:Aeronautics, Space and Transport (old)
HGF - Program:Space (old)
HGF - Program Themes:W - no assignement
DLR - Research area:Space
DLR - Program:W - no assignement
DLR - Research theme (Project):W -- no assignement (old)
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Planetary Research > Terahertz and Infrared Sensors
Deposited By: Prof.Dr. Alexey Semenov
Deposited On:10 Jan 2011 09:37
Last Modified:07 Feb 2013 20:28

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