Broadening of hot-spot response spectrum of superconducting NbN nanowire single-photon detector with reduced nitrogen content

@inproceedings{Henrich2012BroadeningOH,
  title={Broadening of hot-spot response spectrum of superconducting NbN nanowire single-photon detector with reduced nitrogen content},
  author={Dagmar Henrich and Sascha Dorner and M. Hofherr and Konstantin Ilin and Andrei Semenov and Eric Heintze and Michael Scheffler and Martin Dressel and M. Siegel},
  year={2012}
}
The spectral detection efficiency and the dark count rate of superconducting nanowire single-photon detectors (SNSPD) have been studied systematically on detectors made from thin NbN films with different chemical compositions. Reduction of the nitrogen content in the 4 nm thick NbN films results in a decrease of the dark count rates more than two orders of magnitude and in a red shift of the cut-off wavelength of the hot-spot SNSPD response. The observed phenomena are explained by an… CONTINUE READING

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