Generation of elliptical isolated attosecond pulse from oriented H2+ in a linearly polarized laser field

doi:10.1088/1674-1056/ac398b

中国物理B ›› 2022, Vol. 31 ›› Issue (4): 43203-043203.doi: 10.1088/1674-1056/ac398b

Generation of elliptical isolated attosecond pulse from oriented H₂⁺ in a linearly polarized laser field

Yun-He Xing(邢云鹤), Jun Zhang(张军)^†, Xiao-Xin Huo(霍晓鑫), Qing-Yun Xu(徐清芸), and Xue-Shen Liu(刘学深)^‡

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

收稿日期:2021-10-04 修回日期:2021-11-05 接受日期:2021-11-15 出版日期:2022-03-16 发布日期:2022-03-25
通讯作者: Jun Zhang, Xue-Shen Liu E-mail:junzhang@jlu.edu.cn;liuxs@jlu.edu.cn
基金资助:
This work was supported by the National Natural Science Foundation of China (Grants Nos. 12074142 and 11904122).

Generation of elliptical isolated attosecond pulse from oriented H₂⁺ in a linearly polarized laser field

Yun-He Xing(邢云鹤), Jun Zhang(张军)^†, Xiao-Xin Huo(霍晓鑫), Qing-Yun Xu(徐清芸), and Xue-Shen Liu(刘学深)^‡

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

Received:2021-10-04 Revised:2021-11-05 Accepted:2021-11-15 Online:2022-03-16 Published:2022-03-25
Contact: Jun Zhang, Xue-Shen Liu E-mail:junzhang@jlu.edu.cn;liuxs@jlu.edu.cn
Supported by:
This work was supported by the National Natural Science Foundation of China (Grants Nos. 12074142 and 11904122).

摘要/Abstract

摘要： We investigate the ellipticity of the high-order harmonic generation from the oriented H₂⁺ exposed to a linearly polarized laser field by numerically solving the two-dimensional time-dependent Schrödinger equation (2D TDSE). Numerical simulations show that the harmonic ellipticity is remarkably sensitive to the alignment angle. The harmonic spectrum is highly elliptically polarized at a specific alignment angle θ=30°, which is insensitive to the variation of the laser parameters. The position of the harmonic intensity minima indicates the high ellipticity, which can be attributed to the two-center interference effect. The high ellipticity can be explained by the phase difference of the harmonics. This 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.

关键词: high harmonic generation, linearly polarized laser fields, elliptical isolated attosecond pulse, alignment angle, two-center interference effect

Abstract: We investigate the ellipticity of the high-order harmonic generation from the oriented H₂⁺ exposed to a linearly polarized laser field by numerically solving the two-dimensional time-dependent Schrödinger equation (2D TDSE). Numerical simulations show that the harmonic ellipticity is remarkably sensitive to the alignment angle. The harmonic spectrum is highly elliptically polarized at a specific alignment angle θ=30°, which is insensitive to the variation of the laser parameters. The position of the harmonic intensity minima indicates the high ellipticity, which can be attributed to the two-center interference effect. The high ellipticity can be explained by the phase difference of the harmonics. This 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.

Key words: high harmonic generation, linearly polarized laser fields, elliptical isolated attosecond pulse, alignment angle, two-center interference effect

中图分类号: (Multiphoton ionization and excitation to highly excited states)

32.80.Rm

42.65.Ky (Frequency conversion; harmonic generation, including higher-order harmonic generation) 42.65.Re (Ultrafast processes; optical pulse generation and pulse compression)

Yun-He Xing(邢云鹤), Jun Zhang(张军), Xiao-Xin Huo(霍晓鑫), Qing-Yun Xu(徐清芸), and Xue-Shen Liu(刘学深). Generation of elliptical isolated attosecond pulse from oriented H₂⁺ in a linearly polarized laser field[J]. 中国物理B, 2022, 31(4): 43203-043203.

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Generation of elliptical isolated attosecond pulse from oriented H₂⁺ in a linearly polarized laser field

Generation of elliptical isolated attosecond pulse from oriented H₂⁺ in a linearly polarized laser field

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