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Investigation of dark counts in innovative materials for superconducting nanowire single-photon detector applications

L. Parlato ; M. Ejrnaes ; U. Nasti ; Riccardo Arpaia (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; T. Taino ; Thilo Bauch (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; H. Myoren ; R. Sobolewski ; F. Tafuri ; Floriana Lombardi (Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik) ; R. Cristiano ; G. Pepe
Proceedings of SPIE - The International Society for Optical Engineering (0277-786X). Vol. 10229 (2017), p. Article no 102290I.
[Konferensbidrag, refereegranskat]

The phenomenon of dark counts in nanostripes of different superconductor systems such as high-temperature superconducting YBa 2 Cu 3 O 7-x and superconductor/ferromagnet hybrids consisting of either NbN/NiCu or YBa 2 Cu 3 O 7-x /L 0.7 Sr 0.3 MnO 3 bilayers have been investigated. For NbN/NiCu the rate of dark-count transients have been reduced with respect to pure NbN nanostripes and the events were dominated by a single vortex entry from the edge of the stripe. In the case of nanostripes based on YBa 2 Cu 3 O 7-x , we have found that thermal activation of vortices was also, apparently, responsible for triggering dark-count signals.

Nyckelord: dark counts, high-critical temperature superconductors, hybrid materials, Single-photon detectors, superconducting photon detectors



Denna post skapades 2017-07-28.
CPL Pubid: 250848

 

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Institutioner (Chalmers)

Institutionen för mikroteknologi och nanovetenskap, Kvantkomponentfysik

Ämnesområden

Optik

Chalmers infrastruktur