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Free keywords:
Physics, Atomic Physics, physics.atom-ph
MPINP:
Research group K. Z. Hatsagortsyan – Division C. H. Keitel
Abstract:
In strong-field ionization interferences between electron trajectories create
a variety of interference structures in the final momentum distributions. Among
them, the interferences between electron pathways that are driven directly to
the detector and the ones that rescatter significantly with the parent ion lead
to holography-type interference patterns that received great attention in
recent years. In this work, we study the influence of the magnetic field
component onto the holographic interference pattern, an effect beyond the
electric dipole approximation, in experiment and theory. The experimentally
observed nondipole signatures are analyzed via quantum trajectory Monte Carlo
simulations. We provide explanations for the experimentally demonstrated
asymmetry in the holographic interference pattern and its non-uniform
photoelectron energy dependence as well as for the variation of the topology of
the holography-type interference pattern along the laser field direction.
Analytical scaling laws of the interference features are derived, and their
direct relation to either the focal volume averaged laser intensities, or to
the peak intensities are identified. The latter, in particular, provides a
direct access to the peak intensity in the focal volume.
