Abstract
The quantum efficiency of superconducting nanowire single-photon detectors has been systematically studied in a broad spectral range from near ultra-violet to near infrared radiation. Detectors were made from NbN films on sapphire substrates and had thicknesses between 4 and 12 nm. The gradual reduction of the quantum efficiency with increasing wavelength is caused by a crossover from the "hot-spot" to the "vortex" detection scenario. For thicker films the wavelength demarcating the two regimes shifts to shorter wavelengths. © 2010 IOP Publishing Ltd.
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CITATION STYLE
Hofherr, M., Rall, D., Ilin, K. S., Semenov, A., Gippius, N., Hübers, H. W., & Siegel, M. (2010). Superconducting nanowire single-photon detectors: Quantum efficiency vs. film thickness. In Journal of Physics: Conference Series (Vol. 234). Institute of Physics Publishing. https://doi.org/10.1088/1742-6596/234/1/012017
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