物理学报2024，Vol.73Issue(16)：39-46,8.DOI:10.7498/aps.73.20240737
平行偏振三色场对原子非次序双电离的调控
Manipulating nonsequential double ionization of atoms by parallel polarized three-color laser fields
摘要
Abstract
Nonsequential double ionization(NSDI)of He atoms in a parallel polarized three-color field is investigated by using a three-dimensional classical ensemble model.The driving field is composed of 1600-nm and 800-nm laser pulses with equal intensity.A weak 400-nm laser pulse is used as a controlling field.The results indicate that in the correlated electron momentum distribution and ion momentum distribution,the electron pairs and ions of the first returning recollision(FRR)trajectory,the odd-returning recollision(ORR)trajectory(excluding FRR),and the even-returning recollision(ERR)trajectory are located in different regions separated well from each other.The electron pairs from FRR trajectories mainly distribute around the origin,and those electron pairs from ORR and ERR trajectories respectively cluster in the first quadrant and the third quadrant.With the increase of the phase of the controlling field,the proportion of FRR trajectories in NSDI first increases and then decreases,and the proportions of those trajectories with the returning number more than one first decrease and then increase,which leads to the fact that with the increase of the phase of the controlling field,the anticorrelated emissions first increase and then decrease and correspondingly the ion momentum distribution evolves from a double-hump to a triple-hump and then to a double-hump structure.Moreover,NSDI from multiple-returning recollision trajectories mainly occur through recollision-induced direct ionization(RDI)mechanism,while NSDI from the FRR trajectories mainly occurs through recollision-induced excitation with subsequent ionization(RESI)mechanism.Thus the dominant NSDI ionization mechanism can also be controlled by changing the phase of the controlling field.关键词
非次序双电离/平行偏振三色场/再碰撞/超快动力学Key words
nonsequential double ionization/parallel polarized three-color field/recollision/ultrafast dynamics引用本文复制引用
贺佟佟,刘子超,李盈傧,黄诚..平行偏振三色场对原子非次序双电离的调控[J].物理学报,2024,73(16):39-46,8.基金项目
国家自然科学基金(批准号:12074329,12004323)资助的课题. Project supported by the National Natural Science Foundation of China(Grant Nos.12074329,12004323). （批准号:12074329,12004323）
