Figure 3
From: Nonequilibrium band occupation and optical response of gold after ultrafast XUV excitation
Comparison of excitations with XUV and optical pulses. (a) Density response and (b) evolution of the DC conductivity of gold after absorption of \({13.6}\,{\hbox {nm}}\) (red lines) and \({400}\,{\hbox {nm}}\) (blue lines) photons during the time indicated by the shaded area. The green line assuming instant equilibration is independent of the excitation process. All modelling considers electron–phonon coupling according to Ref.35. (c) Total density change of the 6sp-band (solid line) due to an excitation with XUV photons, together with the individual contributions due to direct photo-excitation and Auger filling of 4f-holes (dashed dotted line - both processes yield identical contributions) and impact ionisation of d-electrons (dots). (d) Total density variation in the 6sp-band (solid line) for optical excitation and its contributions via direct photo-absorption (dashed dotted line) and the losses due to filling of holes in the d-band (dots).
