Photoelectron spectra of gas target in circular polarization intense laser field

28th International Conference on Photonic, Electronic and Atomic Collisions

Mizuno, T.^1 ; Kanai, T.^1 ; Azuma, T.^1

RIKEN Advanced Science Institute, Wako, Saitama

351-0198, Japan^1

关键词: Initial momentum;    Intense laser field;    Intense light;    Linear polarization;    Photoelectron spectrum;    Photoionization spectra;    Tail structure;    Time-of-flight spectrometer;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/488/3/032008/pdf
DOI  :  10.1088/1742-6596/488/3/032008

来源: IOP

【 摘 要 】

We investigate photoionization spectra of gas target with intense light field by using time-of-flight spectrometer. It was found that photoelectron spectra of Kr gas have tail structure in both circular and linear polarization light. It is well known that the tail structure is caused by recollision in case of linear light field. Nevertheless it was believed that recollision is suppressed in circular polarization light. In recent works, it was reported that a few percent of continuum photoelectron wave packet may return to ion core in circular polarization field, by assuming of initial momentum distribution of electron. The tail structure by circular polarization light implies that recollision may contribute to photoionization despite circular polarization light.