Several correlation and interference effects in strong-field physics are investigated. We show that the interference of continuum wave packets can be the dominant mechanism of high-harmonic generation (HHG) in the over-thebarrier regime. Next, we combine HHG with resonant X-ray excitation to force the recolliding continuum electron to recombinewith a core hole rather than the valence hole from that it was previously tunnel ionized. The scheme opens up perspectives for nonlinear xuv physics, attosecond X-ray pulses, and spectroscopy of core orbitals. Then, a method is proposed to generate attochirp-free harmonic pulses by engineering the appropriate electron wave packet. Finally, resonant photoionization mechanisms involving two atoms are discussed which can dominate over the direct single-atom ionization channel at interatomic distances in the nanometer range. © Springer-Verlag Berlin Heidelberg 2012.
CITATION STYLE
Kohler, M. C., Müller, C., Buth, C., Voitkiv, A. B., Hatsagortsyan, K. Z., Ullrich, J., … Keitel, C. H. (2012). Electron correlation and interference effects in strong-field processes. In Springer Proceedings in Physics (Vol. 125, pp. 209–217). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-642-28948-4_35
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