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P: Fachverband Plasmaphysik

P 19: Poster: Theorie und Modellierung

P 19.17: Poster

Donnerstag, 28. Februar 2013, 14:00–16:00, Poster EG

Modeling and simulating high-harmonic generation with lasers at plasma surfaces — •Nils Fahrenkamp, Tatyana Liseykina, and Dieter Bauer — Institut für Physik, Universität Rostock, 18051 Rostock

When a linearly polarized laser pulse interacts with a dense plasma surface, the Lorentz force drives longitudinal oscillations at the surface, which hence is expected to behave as an oscillating mirror reflecting the incident light in the specular direction. The widely used oscillation mirror model (OMM) [1] accounts for high-harmonic generation (HHG) by treating the electron density profile as a rigid step-function. The motion of such a "mirror" depends on the plasma density, the laser polarization, the angle of incidence, and the intensity of the laser pulse (see [2,3] and references therein). We present results from one-dimensional particle-in-cell simulations and compare them with both the OMM and a further simplified model where the plasma response is included phenomenologically by inserting a harmonic recoil force into the equation of motion for the plasma-mirror.

[1] S. Bulanov, N. Naumova, F. Pegoraro, Phys. Plasmas 1, 745 (1994).

[2] U. Teubner, P. Gibbon, Rev. Mod. Physics. 81, 45 (2009).

[3] A. Macchi, A Superintense Laser-Plasma Interaction Theory
Primer, (Springer, Heidelberg, 2013).