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Probing the Hotspot Interaction Length in NbN Nanowire Superconducting Single-Photon Detectors

Superconductivity 2017-06-28 v1 Optics Quantum Physics
Authors: J. J. Renema , R. Gaudio , Q. Wang , M. P. van Exter , A. Fiore , M. J. A. de Dood
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Abstract

We measure the maximal distance at which two absorbed photons can jointly trigger a detection event in NbN nanowire superconducting single photon detector (SSPD) microbridges by comparing the one-photon and two-photon efficiency of bridges of different overall lengths, from 0 to 400 nm. We find a length of 23±223 \pm 2 nm. This value is in good agreement with to size of the quasiparticle cloud at the time of the detection event.

Keywords

superconducting single-photon detector NbN nanowire hotspot interaction length quasiparticle cloud microbridge photon efficiency

Cite

@article{arxiv.1607.03088,
  title  = {Probing the Hotspot Interaction Length in NbN Nanowire Superconducting Single-Photon Detectors},
  author = {J. J. Renema and R. Gaudio and Q. Wang and M. P. van Exter and A. Fiore and M. J. A. de Dood},
  journal= {arXiv preprint arXiv:1607.03088},
  year   = {2017}
}

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