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Universal response curve for nanowire superconducting single-photon detectors

By JJ Renema, G Giulia Frucci, Z Zili Zhou, Francesco Mattioli, Alessandro Gaggero, Roberto Leoni, MJA de Dood, A Andrea Fiore and MP van Exter


Using detector tomography, we investigate the detection mechanism in NbN-based superconducting single photon detectors (SSPDs).We demonstrate that the detection probability uniquely depends on a particular linear combination of bias current and energy, for a large variation of bias currents, input energies and detection probabilities, producing a universal detection curve.We obtain this result by studying multiphoton excitations in a nanodetector with a sparsity-based tomographic method that allows factoring out of the optical absorption. We discuss the implication of our model system for the understanding of meander-type SSPDs

Publisher: 'American Physical Society (APS)'
Year: 2013
DOI identifier: 10.1103/physrevb.87.174526
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Provided by: Repository TU/e
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