Ionization without interference

25th Annual International Laser Physics Workshop

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

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

02-093, Poland^1

关键词: Circularly polarized laser pulse;    Energy spectra;    Hydrogenlike ion;    Physical interpretation;    Radiation pressure;    Strong-field approximations;    Super continuum;    Total probabilities;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/826/1/012010/pdf
DOI  :  10.1088/1742-6596/826/1/012010

来源: IOP

【 摘 要 】

Ionization of hydrogen-like ions by intense, circularly polarized laser pulses is analyzed under the scope of the relativistic strong-field approximation. We show that, for specific parameters of the laser field, the energy spectra of photoelectrons present a broad region without interference (supercontinuum) which can be controlled by modifying the laser field intensity. The physical interpretation of the process is developed according to the Keldysh theory, emphasizing the importance of the complex-time saddle point contributions to the total probability of photoionization. The corresponding polar-angle distributions present an asymmetry attributed to radiation pressure effects.