Ultrafast photoluminescence in metals: Theory and its application to silver

Abstract

We study the transient photoluminescence (PL) of photoexcited metals by solving the Boltzmann equation considering the effects of electron-electron (e-e) and electron-phonon (e-ph) collisions, where the e-ph coupling function is calculated from first-principles in order to account for the energy transfer rate between electrons and phonons accurately. We apply the present scheme to the transient PL of silver and demonstrate that the agreement between the theory and experiment is good, where the effect of nonequilibrium electron distribution is significant to fit the experimental data. The effects of the nanoscale roughness at metal surfaces and the e-e umklapp scattering on ultrafast electron dynamics are also discussed.

7 pages, 4 figures

References in corpus (4)

• Advanced capabilities for materials modelling with Quantum ESPRESSO
• Electron relaxation in metals: Theory and exact analytical solutions
• Theory of Out-of-Equilibrium Ultrafast Relaxation Dynamics in Metals
• Nonequilibrium phonon dynamics beyond the quasiequilibrium approach

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• Ultrafast relaxation dynamics of excited carriers in metals: Simplifying the intertwined dependencies upon scattering strengths, phonon temperature, photon energy, and excitation level
• Excitonic effects in the photocarriers dynamics of two-dimensional materials