Abstract
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-the-barrier regime. Next, we combine HHG with resonant X-ray excitation to force the recolliding continuum electron to recombine with 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.
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Acknowledgements
C.B. and M.C.K. were supported by a Marie Curie International Reintegration Grant within the 7\(\mathrm{th}\) European Community Framework Program (call identifier: FP7-PEOPLE-2010-RG, proposal No. 266551). C.B.’s work was funded by the Office of Basic Energy Sciences, Office of Science, U.S. Department of Energy, under Contract No. DE-AC02-06CH11357. T.P. acknowledges support by an MPRG grant of the Max-Planck Gesellschaft. This work was supported in part by the Extreme Matter Institute EMMI.
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Kohler, M.C. et al. (2012). Electron Correlation and Interference Effects in Strong-Field Processes. In: Yamanouchi, K., Katsumi, M. (eds) Multiphoton Processes and Attosecond Physics. Springer Proceedings in Physics, vol 125. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-28948-4_35
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DOI: https://doi.org/10.1007/978-3-642-28948-4_35
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