6 May 2015 Dark counts in superconducting single-photon NbN/NiCu detectors
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Abstract
Nanostripes of hybrid superconductor/ferromagnetic (S/F) NbN/NiCu bilayers and pure superconducting NbN nanostripes have been investigated in dark count experiments. Presence of a ferromagnetic layer influences the superconducting properties of the S/F bilayer, such as the critical current density and the transient photoresponse. The observed significant decrease of the dark-count rate is discussed in terms of vortex-related fluctuation models to shed more light in the intriguing question of the basic mechanism responsible for dark counts in superconducting nanostripe single photon detectors.
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L. Parlato, L. Parlato, Umberto Nasti, Umberto Nasti, M. Ejrnaes, M. Ejrnaes, R. Cristiano, R. Cristiano, H. Myoren, H. Myoren, Roman Sobolewski, Roman Sobolewski, G. Pepe, G. Pepe, "Dark counts in superconducting single-photon NbN/NiCu detectors", Proc. SPIE 9504, Photon Counting Applications 2015, 950404 (6 May 2015); doi: 10.1117/12.2179672; https://doi.org/10.1117/12.2179672
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