Electron Rescattering in a Bicircular Laser Field

25th Annual International Laser Physics Workshop

Hasovi, E.^1 ; Becker, W.^2 ; Miloevi, D.B.^1,2,3

Faculty of Science, University of Sarajevo, Zmaja od Bosne 35, Sarajevo

71000, Bosnia and Herzegovina^1

Max-Born Institut, Max-Born Strasse 2a, Berlin

12489, Germany^2

Academy of Sciences and Arts of Bosnia and Herzegovina, Bistrik 7, Sarajevo

71000, Bosnia and Herzegovina^3

关键词: Circularly polarized;    Counter rotating;    Field components;    High-order above-threshold ionization;    Krypton atoms;    Laser intensities;    Photoelectron spectrum;    Rotational symmetries;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/826/1/012009/pdf
DOI  :  10.1088/1742-6596/826/1/012009

来源: IOP

【 摘 要 】

We investigate high-order above-threshold ionization (HATI) of krypton atoms by a bicircular laser field, which consists of two coplanar co- or counter-rotating circularly polarized fields of frequencies rw and sw. We show that the photoelectron spectra in the HATI process, presented in the momentum plane, exhibit the same discrete rotational symmetry as the driving field. We also analyze HATI spectra for various combinations of the intensities of two field components for co- and counter-rotating fields. We find that the appearance of high-energy plateau for the counter-rotating case is vary sensitive to the laser intensity ratio, while the plateau is always absent for the co-rotating bicircular field.