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Effect of magnetic field on the photon detection in thin superconducting meander structures

Lusche, R and Semenov, A. and Korneeva, Y. and Trifonov, A. and Korneev, A. and Goltsman, G. and Hübers, H.-W. (2014) Effect of magnetic field on the photon detection in thin superconducting meander structures. Physical Review B, 89, p. 104513. American Physical Society. DOI: 10.1103/PhysRevB.89.104513 ISSN 1098-0121

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We have studied the influence of an externally applied magnetic field on the photon and dark count rates of meander-type niobium nitride superconducting nanowire single-photon detectors. Measurements have been performed at a temperature of 4.2 K, and magnetic fields up to 250 mT have been applied perpendicularly to the meander plane. While photon count rates are field independent at weak applied fields, they show a strong dependence at fields starting from approximately ±25 mT. This behavior, as well as the magnetic field dependence of the dark count rates, is in good agreement with the recent theoretical model of vortex-assisted photon detection and spontaneous vortex crossing in narrow superconducting lines. However, the local reduction of the superconducting free energy due to photon absorption, which is the fitting parameter in the model, increases much slower with the photon energy than the model predicts. Furthermore, changes in the free-energy during photon counts and dark counts depend differently on the current that flows through the meander. This indicates that photon counts and dark counts occur in different parts of the meander.

Item URL in elib:https://elib.dlr.de/101471/
Document Type:Article
Title:Effect of magnetic field on the photon detection in thin superconducting meander structures
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Lusche, Rrobert.lusche (at) dlr.deUNSPECIFIED
Korneeva, Y.Staatliche Pädagogische Universität, Moskau, RusslandUNSPECIFIED
Trifonov, A.Staatliche Pädagogische Universität, Moskau, RusslandUNSPECIFIED
Korneev, A.Staatliche Pädagogische Universität, Moskau, RusslandUNSPECIFIED
Goltsman, G.Staatliche Pädagogische Universität Moskau/RusslandUNSPECIFIED
Date:19 March 2014
Journal or Publication Title:Physical Review B
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
DOI :10.1103/PhysRevB.89.104513
Page Range:p. 104513
Publisher:American Physical Society
Keywords:superconducting nanostructures, photon detection, magnetic field
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Earth Observation
DLR - Research area:Raumfahrt
DLR - Program:R EO - Erdbeobachtung
DLR - Research theme (Project):R - Vorhaben Optische Technologien und Anwendungen, R - Project Dependable Navigation, R - Vorhaben Multisensorielle Weltmodellierung
Location: Berlin-Adlershof
Institutes and Institutions:Institute of Optical Sensor Systems > Terahertz and Laser Spectroscopy
Deposited By: Semenov, Prof.Dr. Alexey
Deposited On:04 Jan 2016 08:02
Last Modified:06 Sep 2019 15:29

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