https://doi.org/10.1140/epjd/s10053-022-00468-6
Regular Article – Ultraintense and Ultrashort Laser Fields
Kinetic energy distribution of the rescattering electrons from asymmetric 
/2 pulses
Physics Department, Atomic and Molecular Physics Laboratory, University of Ioannina, University Campus, 45110, Ioannina, Greece
Received:
6
June
2022
Accepted:
26
July
2022
Published online:
5
August
2022
When high intensity pulses are used to ionize an atom or molecule, the electrons produced can be driven back to the ionic core by the laser’s electric field, where they can collide with the ion, resulting to a plethora of phenomena such as high harmonic generation, non-sequential double ionization and more. Here, we consider ionization using an asymmetric /2 pulse, and we study the dependence of the kinetic energy distribution of the returning electrons on the relative phase 
and electric field amplitude ratio 
between the two components of the asymmetric pulse. We find that for a specific combination of and , the kinetic energy of the vast majority of the returning electrons which return to the ion, follows a sharp, nearly monochromatic distribution. We examine the effect of small variations of the asymmetric pulse parameters and , as well as the effect of pulse duration and multiple returns of the electron to the ionic core. We find that the kinetic energy distribution remains narrow for a variety of such conditions, demonstrating the experimental feasibility of the process. This way, /2 asymmetric pulses can offer control over a variety of rescattering-related processes, such as high-harmonic generation, for which we give an example.
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Copyright comment Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
© The Author(s), under exclusive licence to EDP Sciences, SIF and Springer-Verlag GmbH Germany, part of Springer Nature 2022. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.. Springer Nature or its licensor holds exclusive rights to this article under a publishing agreement with the author(s) or other rightsholder(s); author self-archiving of the accepted manuscript version of this article is solely governed by the terms of such publishing agreement and applicable law.
