Probing the ultrafast electron and lattice dynamics of gold using femtosecond mid-infrared pulses

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DOI http://dx.doi.org/10.1103/physrevb.102.134301
Reference H. Sielcken and H.J. Bakker, Probing the ultrafast electron and lattice dynamics of gold using femtosecond mid-infrared pulses, Phys. Rev. B 102, 13: 134301: 1-8 (2020)
Group Ultrafast Spectroscopy

We study the ultrafast electron and lattice dynamics of thin gold films with mid-infrared transmission and reflection pump-probe spectroscopy. We determine the time dependence of the dielectric function, which yields the electron-phonon coupling constant G that determines the energy exchange rate between the electrons and the lattice. From the experimentally obtained dielectric function, we determine the dependence of the electron-electron and the electron-lattice scattering rates on the electron and the lattice temperature.