Investigation of WSi and NbN superconducting single-photon detectors in mid-IR range

Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 μm. WSi structures with narrower strips demonstrated better performance for detection of single pho...

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Bibliographic Details
Published in:IOP conference series. Materials Science and Engineering 2020-04, Vol.781 (1), p.12011
Main Authors: Antipov, A V, Seleznev, V A, Vakhtomin, Yu B, Morozov, P V, Vasilev, D D, Malevannaya, E I, Moiseev, K M, Smirnov, K
Format: Article
Language:English
Subjects:
Detectors
Nanowires
Niobium nitride
Photons
Superconductivity
Surface resistance
Thin films
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Summary:Spectral characteristics of WSi and NbN superconducting single-photon detectors with different surface resistance and width of nanowire strips have been investigated in the wavelength range of 1.3-2.5 μm. WSi structures with narrower strips demonstrated better performance for detection of single photons in longer wavelength range. The difference in normalized photon count rate for such structures reaches one order of magnitude higher in comparison with structures based on NbN thin films at 2.5 μm.
ISSN:1757-8981
1757-899X
DOI:10.1088/1757-899X/781/1/012011