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A: Fachverband Atomphysik
A 17: Atomic Systems in External Fields III
A 17.1: Hauptvortrag
Mittwoch, 4. März 2009, 14:00–14:30, VMP 6 HS-C
Atoms and Clusters in Intense Laser Fields — •Dieter Bauer — Max-Planck-Institut für Kernphysik, Postfach 103980, 69029 Heidelberg, Germany
Analytical descriptions of intense laser atom interaction are commonly based on the so-called strong field approximation (SFA). In this approach, the effect of the laser field on the electron motion after ionization is treated exactly while the effect of the binding potential is neglected. However, there are several well-documented features in photoelectron spectra which can hardly be explained within the standard SFA approach without taking Coulomb-effects into account. Recently we proposed to use quantum trajectories to incorporate Coulomb-effects into the SFA and demonstrated the power and versatility of this approach in Refs. [1–3]. Many of the interesting phenomena in strong field physics rely on the rescattering of electrons. We have identified two novel recollision pathways, namely the simultaneous recombination of two electrons [4] and the excitation of plasmons in collective multi-electron systems such as C60 [5]. New results on the generation of energetic electrons and ions in the interaction of intense laser beams with clusters and droplets will be also discussed.
[1] S.V. Popruzhenko et al., Phys. Rev. A 77, 053409 (2008), [2] S.V. Popruzhenko, D. Bauer, J. Mod. Opt. 55, 2573 (2008), [3] S.V. Popruzhenko et al., Phys. Rev. Lett. 101, 193003 (2008), [4] P. Koval et al., Phys. Rev. Lett. 98, 043904 (2007), [5] M. Ruggenthaler et al., Phys. Rev. A 78, 033413 (2008).