Inhomogeneous critical current in nanowire superconducting single-photon detectors

R. Gaudio; K.P.M. Hoog, op 't; Z. Zhou; D. Sahin; A. Fiore

doi:10.1063/1.4903071

Inhomogeneous critical current in nanowire superconducting single-photon detectors

R. Gaudio, K.P.M. Hoog, op 't, Z. Zhou, D. Sahin, A. Fiore

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Abstract

A superconducting thin film with uniform properties is the key to realize nanowire superconducting single-photon detectors (SSPDs) with high performance and high yield. To investigate the uniformity of NbN films, we introduce and characterize simple detectors consisting of short nanowires with length ranging from 100 nm to 15 lm. Our nanowires, contrary to meander SSPDs, allow probing the homogeneity of NbN at the nanoscale. Experimental results, endorsed by a microscopic model, show the strongly inhomogeneous nature of NbN films on the sub-100 nm scale.

Original language	English
Article number	222602
Pages (from-to)	1-4
Number of pages	4
Journal	Applied Physics Letters
Volume	105
DOIs	https://doi.org/10.1063/1.4903071
Publication status	Published - 2014

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title = "Inhomogeneous critical current in nanowire superconducting single-photon detectors",

abstract = "A superconducting thin film with uniform properties is the key to realize nanowire superconducting single-photon detectors (SSPDs) with high performance and high yield. To investigate the uniformity of NbN films, we introduce and characterize simple detectors consisting of short nanowires with length ranging from 100 nm to 15 lm. Our nanowires, contrary to meander SSPDs, allow probing the homogeneity of NbN at the nanoscale. Experimental results, endorsed by a microscopic model, show the strongly inhomogeneous nature of NbN films on the sub-100 nm scale.",

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AB - A superconducting thin film with uniform properties is the key to realize nanowire superconducting single-photon detectors (SSPDs) with high performance and high yield. To investigate the uniformity of NbN films, we introduce and characterize simple detectors consisting of short nanowires with length ranging from 100 nm to 15 lm. Our nanowires, contrary to meander SSPDs, allow probing the homogeneity of NbN at the nanoscale. Experimental results, endorsed by a microscopic model, show the strongly inhomogeneous nature of NbN films on the sub-100 nm scale.

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Inhomogeneous critical current in nanowire superconducting single-photon detectors

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