@Article{Beck_etal2011, author="Beck, M. and Klammer, M. and Lang, S. and Leiderer, P. and Kabanov, V. V. and Gol{\textquoteright}tsman, G. N. and Demsar, J.", title="Energy-gap dynamics of superconducting NbN thin films studied by time-resolved terahertz spectroscopy", journal="Phys. Rev. Lett.", year="2011", volume="107", number="17", pages="4", optkeywords="NbN thin film; energy gap dynamics", abstract="Using time-domain terahertz spectroscopy we performed direct studies of the photoinduced suppression and recovery of the superconducting gap in a conventional BCS superconductor NbN. Both processes are found to be strongly temperature and excitation density dependent. The analysis of the data with the established phenomenological Rothwarf-Taylor model enabled us to determine the bare quasiparticle recombination rate, the Cooper pair-breaking rate and the electron-phonon coupling constant, $\lambda$=1.1{\textpm}0.1, which is in excellent agreement with theoretical estimates.", optnote="exported from refbase (https://db.rplab.ru/refbase/show.php?record=641), last updated on Thu, 13 May 2021 19:28:09 -0500", doi="10.1103/PhysRevLett.107.177007", opturl="https://doi.org/10.1103/PhysRevLett.107.177007" }