Heidelberg 2015 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 5: Atomic systems in external fields

A 5.5: Vortrag

Montag, 23. März 2015, 15:30–15:45, C/kHS

Strong-field ionization with semi-classical trajectories: the role of the initial conditions — •Thomas Keil and Dieter Bauer — Universität Rostock, Institut für Physik

Photoelectron spectra for atoms in 7 µm laser fields [1] are calculated using so-called ’quantum orbits’. In the semi-classical limit, the method is known to yield good results in atomic [1-3] and cluster [4] ionization (see [5] for a review). Moreover, it is computationally less demanding than corresponding TDSE calculations, especially for very long laser wavelengths and high intensities where the ab initio solution of the TDSE is expensive, if not prohibitive. In this work, we analyze trajectory-based Coulomb-corrected strong-field approximation (CCSFA) calculations for momentum-resolved photoelectron spectra with respect to the influence of the choices for (i) the ionization rate and (ii) the initial conditions (i.e., momentum and tunnel exit).

[1] Y. Huismans, Science 331, 61 (2011)
[2] T.-M. Yan et al., Phys. Rev. Lett. 105, 253002 (2010)
[3] T.-M. Yan et al., Springer Series in Chem. Phys. vol. 104 (2013)
[4] Th. Keil et al., J. Phys. B 47, 124029 (2014)
[5] S.V. Popruzhenko, J. Phys. B 47 204001 (2014).

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