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
• 来源期刊: 理论物理通讯（英文版）
• 年，卷（期）: 2022,（1）
• 所属期刊栏目: ATOMIC,MOLECULAR,OPTICAL(AMO)AND PLASMA PHYSICS,CHEMICAL PHYSICS
• 页码范围: 84-91
• 页数: 8页
• 语种: 英文

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 Schr(o)dinger equation.It is found that the number of vortex arms is extremely sensitive to the ellipticity and wavelength of counter-rotating 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.