Photodetachment dynamics in the time-dependent oscillating electric and magnetic fields

Abstract

We study the photodetachment dynamics of H− ion in the time-dependent oscillating electric and magnetic fields for the first time. The wave function of the detached electron at a given point on the detector plane is constructed using the semiclassical method, which is related to the electron trajectories in the oscillating electric and magnetic fields. It is found due to the interplay of the time-dependent oscillating electric and magnetic fields, multiple electron trajectories emitted from the negative ion source can arrive at a given detector point. The interference between these electron trajectories causes the oscillatory structures in the electron probability density. Modifications of electron probability density caused by different oscillating electric and magnetic fields and the position of the detector plane are also studied and explained. It is shown that even at a macroscopic distance from the negative ion source, the interference patterns in the electron probability density can be seen clearly, which can be realized in an actual photodetachment experiment. Therefore, our work can serve as a guide for the future experimental studies of the photodetachment of negative ions in the oscillating electric and magnetic fields.