Extracting the Ionization Rate From Photoelectron Momentum Distribution Induced by Circularly Polarized Laser Pulse

In this paper, the adiabatic theory is implemented to consider the ionization process of molecular system exposed to circularly polarized laser pulse. The photoelectron momentum distribution exhibits strong evidence of the properties of the molecular orbital. We also present the possibility to retrieve the ionization rate of the ionized electron from photoelectron momentum distribution in the transverse plane respecting to the polarized plane of the laser field. These results are vital in the viewpoint of the experiment. Several states of molecular hydrogen ion are considered for illustration.

The improved program calculating the photomomentum distribution induced by circularly polarized laser

In this paper, we propose an improved method to curtail the time consumption of calculation within the adiabatic theory for the photomomentum distribution (PD) of hydrogen and argon atoms. The method is then extended for threedimensional PD induced by circularly polarized laser. The study is an extension of the work [Phys. Rev. A 92, 043402 (2015)] and a direct comparison of calculating efficiency based on that work is made. The hydrogen and argon atoms exposed to half-cycle laser pulses are used for illustration the applicability of the improved program. The results shows significant reduction in calculation time as well as good consistence between the current results and previous studies.