Inhomogeneous critical current in nanowire superconducting single-photon detectors

R. Gaudio, K. P M Op 'T Hoog, Z. Zhou, D. Sahin, A. Fiore

Research output: Contribution to journalArticle (Academic Journal)peer-review

21 Citations (Scopus)


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 100nm to 15μm. 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-100nm scale.

Original languageEnglish
Article number222602
JournalApplied Physics Letters
Issue number22
Publication statusPublished - 1 Dec 2014

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