Investigation of dark count rate in NbRe microstrips for single photon detection
Artikel i vetenskaplig tidskrift, 2023

Superconducting microstrip single photon detectors (SMSPDs) received great interest since they are expected to combine the excellent performance of superconducting nanostrip single photon detectors with the possibility to cover large active areas using low-cost fabrication techniques. In this work, we fabricated SMSPDs based on NbRe to investigate the role of vortices in the dark counts events in this innovative material and in devices with micrometer size. We realized devices with different layouts, namely single microstrips and pairs of parallel microstrips. The energy barriers related to the motion of single vortices or vortex-antivortex pairs, responsible of detection events, have been determined and compared with the ones of similar devices based on different materials, such as MoSi, WSi and NbN. The analysis confirms the high potential of NbRe for the realization of superconducting single photon detectors with large areas.

NbRe microstrips

superconducting microstrips single photon detectors

dark counts

Författare

P. Ercolano

Universita degli Studi di Napoli Federico II

C. Cirillo

SPIN CNR Institute - Salerno

M. Ejrnaes

CNR - SuPerconducting and other INnovative materials and devices institute, Napoli

Federico Chianese

Chalmers, Mikroteknologi och nanovetenskap, Kvantkomponentfysik

D. Salvoni

Ltd Jiashan

C. Bruscino

Universita degli Studi di Napoli Federico II

R. Satariano

CNR - SuPerconducting and other INnovative materials and devices institute, Napoli

A. Cassinese

Universita degli Studi di Napoli Federico II

Istituto Nazionale di Fisica Nucleare

C. Attanasio

Universita degli Studi di Salerno

G. P. Pepe

Universita degli Studi di Napoli Federico II

L. Parlato

Universita degli Studi di Napoli Federico II

Superconductor Science and Technology

0953-2048 (ISSN) 1361-6668 (eISSN)

Vol. 36 10 105011

Ämneskategorier

Den kondenserade materiens fysik

DOI

10.1088/1361-6668/acf24a

Mer information

Senast uppdaterat

2023-09-28