Dark counts in superconducting single-photon NbN/NiCu detectors

L. Parlato; Umberto Nasti; M. Ejrnaes; R. Cristiano; H. Myoren; Roman Sobolewski; G. Pepe

doi:10.1117/12.2179672

6 May 2015 Dark counts in superconducting single-photon NbN/NiCu detectors

L. Parlato, Umberto Nasti, M. Ejrnaes, R. Cristiano, H. Myoren, Roman Sobolewski, G. Pepe

Proceedings Volume 9504, Photon Counting Applications 2015; 950404 (2015) https://doi.org/10.1117/12.2179672
Event: SPIE Optics + Optoelectronics, 2015, Prague, Czech Republic

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.

Citation Download Citation

L. Parlato, Umberto Nasti, M. Ejrnaes, R. Cristiano, H. Myoren, Roman Sobolewski, and G. Pepe "Dark counts in superconducting single-photon NbN/NiCu detectors", Proc. SPIE 9504, Photon Counting Applications 2015, 950404 (6 May 2015); https://doi.org/10.1117/12.2179672

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