Generation of elliptical isolated attosecond pulse from oriented H_(2)^(+)in a linearly polarized laser field

作     者：Yun-He Xing Jun Zhang Xiao-Xin Huo Qing-Yun Xu Xue-Shen Liu 邢云鹤;张军;霍晓鑫;徐清芸;刘学深

作者机构：Institute of Atomic and Molecular PhysicsJilin UniversityChangchun 130012China 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2022年第31卷第4期

页      面：281-286页

核心收录：

学科分类：080901[工学-物理电子学] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 080401[工学-精密仪器及机械] 0804[工学-仪器科学与技术] 0703[理学-化学] 0803[工学-光学工程] 

基　　金：supported by the National Natural Science Foundation of China(Grants Nos.12074142 and 11904122) 

主　　题：high harmonic generation linearly polarized laser fields elliptical isolated attosecond pulse alignment angle two-center interference effect 

摘      要：We investigate the ellipticity of the high-order harmonic generation from the oriented H_(2)^(+)exposed to a linearly polarized laser field by numerically solving the two-dimensional time-dependent Schrodinger equation(2 D TDSE).Numerical simulations show that the harmonic ellipticity is remarkably sensitive to the alignment *** harmonic spectrum is highly elliptically polarized at a specific alignment angleθ=30°,which is insensitive to the variation of the laser *** position of the harmonic intensity minima indicates the high ellipticity,which can be attributed to the two-center interference *** high ellipticity can be explained by the phase difference of the *** result facilitates the synthesis of a highly elliptical isolated attosecond pulse with duration down to 65 as,which can be served as a powerful tool to explore the ultrafast dynamics of molecules and study chiral light-matter interaction.