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We discuss microscopic mechanisms of the violent dynamics following stronglaser excitation of a metal cluster embedded in a rare gas matrix, taking astest case Na$_8$@Ar$_434$. This covers at least two aspects : first, itrepresents the typical experimental situation of metal clusters handled inraregas matrices or a finite drop of surrounding raregas material, and second,it serves as a generic test case for highly excited chromophores in inertsurroundings addressing questions of energy transport and perturbation of themedium. We simulate the process up to 10 ps using a mixed quantum mechanical(for the electrons) and classical (ions and atoms) approach and analyze theemerging dynamics with respect to all basic constituents : cluster electrons,cluster ions, and matrix atoms. We find several stages of relaxation takingplace with time scales from a few fs to over a few ps and much slower processesremaining for long after the simulation. A particularly interesting aspect isthat the surrounding raregas material stabilizes a highly charged metal clusterwhich would otherwise explode without delay.

Embedded metal cluster in strong laser fields