摘要
By using the three-dimensional classical ensemble model,the recollision dynamics in nonsequential double ionization(NSDI)of Ar by 780-nm laser pulses at(6-1.2)×10^(14)W/cm^(2) was extensively studied.We revealed the picture of multiplerecollision in the double ionization events at the laser intensity region below the recollision-ionization threshold.Via tracing the NSDI trajectories,it was found that the contribution of these multiple-recollision events increases as the laser intensity decreases.In this low intensity region,many multiple-recollision induced NSDI trajectories occur through the doubly excited states.The decay speed of the doubly excited state decreases with the decreasing laser intensity.
作者
马晓萌
童爱红
王茁
翟春洋
Xiao-Meng Ma;Ai-Hong Tong;Zhuo Wang;Chun-Yang Zhai(Department of Physics and Mechanical&Electrical Engineering,Hubei University of Education,Wuhan 430205,China;Institute of Optoelectronic Materials and Components,Hubei University of Education,Wuhan 430205,China;College of Physics and Electronic Engineering,Xinyang Normal University,Xinyang 464000,China)
基金
Project supported by the Natural Science Foundation of Hubei Province,China(Grant No.2020CFB362)
Scientific Research Program of Hubei Provincial Department of Education,China(Grant No.B2020176)
the National Natural Science Foundation of China(Grant No.12104389)。
