Fig. 4: Ultrafast energies distribution and kinetics of the excited state in gold nanoparticles.
From: The dynamics of plasmon-induced hot carrier creation in colloidal gold
A Comparison of the valence band photoelectron spectrum (VB-XPS) with the Au L3-edge transient XANES spectrum collected at time zero. The zero of the energy scale corresponds to the Fermi level. The optical pulse in green is depicted as a Gaussian band centered at 2.33 eV with a full width at half maximum (FWHM) of 15 nm, corresponding to an energy envelope of ±0.13 eV; B The transient XANES measured at the Au L3-edge absorption spectra collected at different pump-probe time delays (0 fs corresponds to the best possible overlap between pump and probe). C Relative changes in hot holes mean energy distribution (blue trace) and population (red trace). D The temporal evolution of the hot holes with different energies indicates that the Fermi-Dirac distribution is not reached within 500 fs. Note that the energy of the holes is affected by the Au core-hole lifetime.
