Investigation of vortex arms in electron vortices by counter-rotating elliptically polarized attosecond laser pulses  

作　　者：Zhuo Wang Qi Zhen Yue Sun Jia-He Chen Xue-Shen Liu 

机构地区：[1]Institute of Atomic and Molecular Physics,Jilin University,Changchun 130012,China [2]School of Civil Engineering,Changchun Institute of Technology,Changchun 130012,China

出　　处：《Communications in Theoretical Physics》2022年第1期84-91,共8页理论物理通讯（英文版）

基　　金：This work was supported by the National Natural Science Foundation of China(Grants No.12074142).

摘　　要：We theoretically investigate the vortex patterns in photoelectron momentum distributions of He^(+)driven by counter-rotating elliptically polarized,time delayed attosecond laser pulses by numerically solving the two-dimensional time-dependent Schrodinger equation.It is found that the number of vortex arms is extremely sensitive to the ellipticity and wavelength of counterrotating elliptically polarized laser pulses,which is illustrated by the attosecond perturbation ionization models.In addition,the effect of different time delays between two pulses on the interference patterns is also investigated and the corresponding physical mechanism is demonstrated.Since the wavelength,ellipticity and time delay have a significant effect on the vortex interference patterns,this may be a new method for laser field detection.

关 键 词：vortex arms photoelectron momentum distributions elliptically polarized laser pulses 

分 类 号：O469[理学—凝聚态物理]