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Temperature-dependence of detection efficiency in NbN and TaN SNSPD by Engel, Andreas; Inderbitzin, Kevin; Schilling, Andreas; Lusche, Robert; Semenov, Alexei; Hübers, Heinz-Wilhelm; Henrich, Dagmar; Hofherr, Matthias; Il'in, Konstantin; Siegel, Michael is a scholarly article available to read on EtoBox.

What is Temperature-dependence of detection efficiency in NbN and TaN SNSPD about?

We present systematic measurements of the temperature-dependence of detection efficiencies in TaN and NbN superconducting nanowire single-photon detectors. We have observed a clear increase of the cut-off wavelength with decreasing temperature that we can qualitatively describe with a temperature-dependent diffusion coefficient of the quasi-particles created after photon absorption. Furthermore, the detection efficiency at wavelengths shorter than the cut-off wavelength as well as at longer wavelengths exhibit distinct temperature dependencies. The underlying causes and possible consequences for microscopic detection models are discussed.

Author

Engel, Andreas; Inderbitzin, Kevin; Schilling, Andreas; Lusche, Robert; Semenov, Alexei; Hübers, Heinz-Wilhelm; Henrich, Dagmar; Hofherr, Matthias; Il'in, Konstantin; Siegel, Michael

Published

2012

Language

EN