Mainz 2017 – scientific programme
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A: Fachverband Atomphysik
A 38: Atoms in Strong Fields II
A 38.5: Talk
Friday, March 10, 2017, 15:30–15:45, N 2
Fast Photoelectrons from clusters in Intense IR lasers — •Abraham Camacho Garibay, Ulf Saalmann, and Jan-Michael Rost — MPI-PKS, Dresden
Unlike single atoms where energy absorption occurs either directly through drift momentum (with the characteristic 2 Up cutoff) or by single binary collisions (10 Up cutoff), many-particle systems exhibit additional absorption mechanisms. Either by multiple scattering events from different ions or by slingshot effects by the cluster potential, electrons can be emitted above the mentioned cutoffs. Here we simulate the dynamics of Ar clusters in intense IR laser fields, combining Classical Molecular Dynamics simulations with binary Coulombic collisions. Through this scheme, we have been able to observe photoelectrons with surprisingly high energies, in accordance with recent experimental results.