Experimental test of theories of the detection mechanism in a nanowire superconducting single photon detector

J. J. Renema*, R. Gaudio, Q. Wang, Z. Zhou, A. Gaggero, F. Mattioli, R. Leoni, D. Sahin, M. J A De Dood, A. Fiore, M. P. Van Exter

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)

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Abstract

We report an experimental test of the photodetection mechanism in a nanowire superconducting single photon detector. Detector tomography allows us to explore the 0.8-8 eV energy range via multiphoton excitations. High accuracy results enable a detailed comparison of the experimental data with theories for the mechanism of photon detection. We show that the temperature dependence of the efficiency of the superconducting single photon detector is determined not by the critical current but by the current associated with vortex unbinding. We find that both quasiparticle diffusion and vortices play a role in the detection event.

Original languageEnglish
Article number117604
JournalPhysical Review Letters
Volume112
Issue number11
DOIs
Publication statusPublished - 21 Mar 2014

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    Renema, J. J., Gaudio, R., Wang, Q., Zhou, Z., Gaggero, A., Mattioli, F., Leoni, R., Sahin, D., De Dood, M. J. A., Fiore, A., & Van Exter, M. P. (2014). Experimental test of theories of the detection mechanism in a nanowire superconducting single photon detector. Physical Review Letters, 112(11), [117604]. https://doi.org/10.1103/PhysRevLett.112.117604