Abstract
Several different time scales compete in metal clusters, Mie plasmon oscillations, Landau damping, electronic collisions, and ionic motion. It is the aim of this contribution to disentangle these using a palette of different dynamical observables: optical absorption, photo-electron spectroscopy (in energy and angular distributions), and pump-and-probe analysis. Test cases are Na clusters. The theoretical description is based on time-dependent local-density approximation for the electrons coupled to simultaneous classical propagation of ionic dynamics. This provides a non-adiabatic treatment which is necessary in connection with dynamical processes induced by intense femtosecond lasers. The observables cover different dynamical regimes: Optical response and photo-electrons stay in the linear regime while pump-and-probe scenarios touch typically the semi-linear regime (i.e. non-linear but still non-destructive). Finally, we sketch laser-induced Coulomb explosion as an example from the non-linear and destructive regime.
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Andrae, K. et al. (2004). Analysis of Cluster Dynamics. In: Morawetz, K. (eds) Nonequilibrium Physics at Short Time Scales. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-662-08990-3_18
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DOI: https://doi.org/10.1007/978-3-662-08990-3_18
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