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\bibitem{Baek_etal2011} Baek, B., Lita, A. E., Verma, V., \& Nam, S. W. (2011). Superconducting a-WxSi1{\textendash}x nanowire single-photon detector with saturated internal quantum efficiency from visible to 1850 nm. \textit{Appl. Phys. Lett.}, \textit{98}(25), 3.

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