Düsseldorf 2007 – wissenschaftliches Programm
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MO: Fachverband Molekülphysik
MO 12: Femtosecond Spectroscopy I
MO 12.4: Vortrag
Montag, 19. März 2007, 14:45–15:00, 6D
Antisymmetric molecular orbitals and magnetic-field effects in intense laser fields — •Robert Fischer1, Manfred Lein1,2, and Christoph H. Keitel1 — 1Max-Planck-Institut für Kernphysik, Heidelberg — 2Institut für Physik, Universität Kassel
This talk points out a recently discovered mechanism to enhance recollision-related effects like high-harmonic generation by combining the properties of antisymmetric molecular orbitals and the drift induced by the laser magnetic field [1]. In order to investigate the interplay of the two drifts with regard to high-harmonic generation we present results obtained by the direct numerical solution of the time-dependent Schrödinger equation for a scenario in which an antisymmetric wavefunction is subject to a very intense short laser pulse. To take the notable magnetic field drift into account the simulations have been performed without applying the dipole approximation for the laser field. As a result of the combination of both effects a dramatic enhancement of the harmonic signal by several orders of magnitude has been observed.
[1] R. Fischer, M. Lein, and C. H. Keitel, Phys. Rev. Lett. 97, 143901 (2006).