Charaev, Ilya and Semenov, Alexey and Ilin, K. and Siegel, M. (2019) Magnetic-Field Enhancement of Performance of Superconducting Nanowire Single-Photon Detector. IEEE Transactions on Applied Superconductivity, 29 (5), e2200605. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TASC.2019.2898001 ISSN 1051-8223
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Abstract
We present SNSPDs from NbN nanowires shaped after square-spiral, that allows an increase not only in critical currents, but also an extension of spectral detection efficiencies by just applying an external magnetic field. Using negative electron-beam lithography with the positive resist for shaping nanowires made it possible to reduce the inner bend radius. Consequently, the effect of critical-current enhancement in the magnetic field becomes stronger than it was demonstrated earlier. Here we achieved a 13% increase of the critical current in the magnetic field. We measured the spectra of the single-photon detection efficiency in the wavelength ranging from 400 to 1100 nm in the magnetic field. At zero field, the square-spiral has the spectrum similar to that of a meander. At the field providing the maximum of the critical current, the detection efficiency and the cutoff wavelength in the spectrum increase by 20% and by 54%, respectively. The magnetic-field dependence of the dark count rate is well described by the proposed analytical model.
Item URL in elib: | https://elib.dlr.de/133314/ | |||||||||||||||
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Document Type: | Article | |||||||||||||||
Title: | Magnetic-Field Enhancement of Performance of Superconducting Nanowire Single-Photon Detector | |||||||||||||||
Authors: |
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Date: | August 2019 | |||||||||||||||
Journal or Publication Title: | IEEE Transactions on Applied Superconductivity | |||||||||||||||
Refereed publication: | Yes | |||||||||||||||
Open Access: | No | |||||||||||||||
Gold Open Access: | No | |||||||||||||||
In SCOPUS: | Yes | |||||||||||||||
In ISI Web of Science: | Yes | |||||||||||||||
Volume: | 29 | |||||||||||||||
DOI : | 10.1109/TASC.2019.2898001 | |||||||||||||||
Page Range: | e2200605 | |||||||||||||||
Publisher: | IEEE - Institute of Electrical and Electronics Engineers | |||||||||||||||
ISSN: | 1051-8223 | |||||||||||||||
Status: | Published | |||||||||||||||
Keywords: | Nanowires, superconducting devices, magnetic field, single-photon detector, critical current | |||||||||||||||
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 | |||||||||||||||
Location: | Berlin-Adlershof | |||||||||||||||
Institutes and Institutions: | Institute of Optical Sensor Systems | |||||||||||||||
Deposited By: | Semenov, Prof.Dr. Alexey | |||||||||||||||
Deposited On: | 08 Jan 2020 09:18 | |||||||||||||||
Last Modified: | 08 Jan 2020 09:18 |
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