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19 April 2024

» arxiv » 1303.4546

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Effect of the wire width on the intrinsic detection efficiency of superconducting-nanowire single-photon detectors
R. Lusche ; A. Semenov ; H.-W. Huebers ; K. Ilin ; M. Siegel ; Y. Korneeva ; A. Trifonov ; A. Korneev ; G. Goltsman ; D. Vodolazov ;
Date:	19 Mar 2013
Abstract:	Thorough spectral study of the intrinsic single-photon detection efficiency in superconducting TaN and NbN nanowires with different widths shows that the experimental cut-off in the efficiency at near-infrared wavelengths is most likely caused by the local deficiency of Cooper pairs available for current transport. For both materials the reciprocal cut-off wavelength scales with the wire width whereas the scaling factor quantitatively agrees with the hot-spot detection models. Comparison of the experimental data with vortex-assisted detection scenarios shows that these models predict a stronger dependence of the cut-off wavelength on the wire width.
Source:	arXiv, 1303.4546
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