Nondipole Effects in Atomic Ionization Induced by an Intense Counter-Rotating Bicircular Laser Field
Kahvedzic R, Habibovic D, Becker W, Gräfe S, Milosevic DB (2023)
Publication Type: Journal article
Publication year: 2023
Journal
Book Volume: 535
Article Number: 2200616
Journal Issue: 3
Abstract
Nondipole effects occurring in the process of atomic ionization by an intense, mid-infrared, counter-rotating bicircular laser field are investigated using the strong-field approximation with leading-order nondipole corrections. The time integrals appearing in the expression for the differential ionization rate are computed in two ways: numerically, and by applying the saddle-point approximation. The nondipole corrections introduce an asymmetry in the photoelectron momentum distribution along the field propagation direction. The asymmetry is quantified by the partial average value of the propagation-direction momentum component of the photoelectrons and by the normalized difference of the differential ionization rates computed including and excluding the nondipole corrections. Using the saddle-point approximation, it is investigated how the nondipole corrections change the solutions for direct photoelectrons and how this affects the momentum spectra. The impact of nondipole corrections increases with increasing photoelectron energy. Analysis of the complete photoelectron spectra including both direct and rescattered photoelectrons shows that, in the low-energy region, a shift against the propagation direction occurs. The partial average of the propagation–direction momentum component in the rescattering region exhibits a plateau structure and also a local minimum structure that was recently observed in an experiment with a linearly polarized laser field (Lin et al., Phys Rev. Lett. 128, 023201 (2022)).
Involved external institutions
Friedrich-Schiller-Universität Jena
Germany (DE)
University of Sarajevo
Bosnia And Herzegovina (BA)
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V. / Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
Germany (DE)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (IOF) / Fraunhofer Institute for Applied Optics and Precision Engineering
Germany (DE)
Germany (DE)
University of Sarajevo
Bosnia And Herzegovina (BA)
Max-Born-Institut für Nichtlineare Optik und Kurzzeitspektroskopie im Forschungsverbund Berlin e.V. / Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy
Germany (DE)
Fraunhofer-Institut für Angewandte Optik und Feinmechanik (IOF) / Fraunhofer Institute for Applied Optics and Precision Engineering
Germany (DE)
How to cite
APA:
Kahvedzic, R., Habibovic, D., Becker, W., Gräfe, S., & Milosevic, D.B. (2023). Nondipole Effects in Atomic Ionization Induced by an Intense Counter-Rotating Bicircular Laser Field. Annalen Der Physik, 535(3). https://dx.doi.org/10.1002/andp.202200616
MLA:
Kahvedzic, Resad, et al. "Nondipole Effects in Atomic Ionization Induced by an Intense Counter-Rotating Bicircular Laser Field." Annalen Der Physik 535.3 (2023).
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