Eikonal perturbation theory in photoionization

24th International Laser Physics Workshop

Vélez, F. Cajiao^1 ; Krajewska, K.^1,2 ; Kamiski, J.Z.^1

Institute of Theoretical Physics, Faculty of Physics, University of Warsaw, Pasteura 5, Warszawa

02-093, Poland^1

Department of Physics and Astronomy, University of Nebraska, Lincoln

NE

68588-0299, United States^2

关键词: Binding potential;    Eikonal;    Eikonal approximations;    Electron trajectories;    First-order approximations;    High order harmonic generation;    Perturbation theory;    Rescattering;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/691/1/012003/pdf
DOI  :  10.1088/1742-6596/691/1/012003

来源: IOP

【 摘 要 】

The eikonal perturbation theory is formulated and applied to photoionization by strong laser pulses. A special emphasis is put on the first order approximation with respect to the binding potential, which is known as the generalized eikonal approximation [2015 Phys. Rev. A 91 053417]. The ordinary eikonal approximation and its domain of applicability is derived from the generalized eikonal approximation. While the former approach is singular for the electron trajectories which return to the potential center, the generalized eikonal avoids this problem. This property makes it a promising tool for further investigations of rescattering and high-order harmonic generation processes.