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Berlin 2001 – scientific programme

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A: Atomphysik

A 3: Multi Photon Processes

A 3.5: Talk

Monday, April 2, 2001, 16:45–17:00, H1058

High harmonic generation beyond the electric dipole approximation — •M. W. Walser1, C. H. Keitel1, A. Scrinzi2 und T. Brabec21Theoretische Quantendynamik, Universität Freiburg, Herman-Herder-Straße 3, 79104 Freiburg — 2Institut für Photonik, TU Wien, Gusshausstraße 27/387, 1040 Wien

We introduce a generalization of the model of Corkum and Lewenstein [1,2] for high harmonic generation: since the velocity of the electron is comparable with the velocity of light we take into account the electric dipole and magnetic quadrupole interaction [3]. Quantum and classical calculations are found to be in excellent agreement, which allows one to explain the influence of multipole effects in terms of an intuitive picture. We also show for which range of parameters there are deviations from the former models.
[1] P. B. Corkum, Phys. Rev. Lett. 71, 1994 (1993).
[2] M. Lewenstein et al., Phys. Rev. A 49, 2117 (1994).
[3] M. W. Walser et al., Phys. Rev. Lett. 85, 5082 (2000).

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