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\bibitem{Kovalyuk_etal2013} Kovalyuk, V., Hartmann, W., Kahl, O., Kaurova, N., Korneev, A., Goltsman, G., et al. (2013). Absorption engineering of NbN nanowires deposited on silicon nitride nanophotonic circuits. \textit{Opt. Express}, \textit{21}(19), 22683--22692.

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