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A: Fachverband Atomphysik
A 12: Posters: Interaction with intense laser pulses
A 12.1: Poster
Tuesday, March 11, 2008, 16:30–18:30, Poster C3
Laser-driven relativistic recollisions — •Markus C. Kohler1, Michael Klaiber1,2, Mario Verschl1, Karen Z. Hatsagortsyan1, and Christoph H. Keitel1 — 1Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, D-69117 Heidelberg, Germany — 2Theoretische Quantendynamik, Physikalisches Institut der Albert-Ludwigs-Universität, Hermann-Herder-Straße 3, D-79104 Freiburg, Germany
In the relativistic regime the magnetically induced drift of an ionized electron severely suppresses the probability of the electron revisiting the ionic core and, consequently, the yield of harmonic photons. We discuss several methods to increase the efficiency of rescattering in the relativistic regime. In the strong relativistic regime, we show how efficient recollisions are feasible by employing strong laser pulses which are specially tailored as attosecond pulse trains. For experimental realization it is more advantageous to employ counter-propagating attosecond pulse trains. This way the energies of the revisiting electron at the atomic core can reach the MeV domain, thus rendering hard x-ray harmonics, zeptosecond pulses and nuclear reactions with single atoms feasible. Other recollision schemes proposed are based on two consecutive counterpropagating laser pulses and magnetic field.