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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 |
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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.
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Received: 04 October 2021
Revised: 05 November 2021
Accepted manuscript online: 15 November 2021
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PACS:
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32.80.Rm
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(Multiphoton ionization and excitation to highly excited states)
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42.65.Ky
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(Frequency conversion; harmonic generation, including higher-order harmonic generation)
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42.65.Re
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(Ultrafast processes; optical pulse generation and pulse compression)
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| Fund: This work was supported by the National Natural Science Foundation of China (Grants Nos. 12074142 and 11904122). |
Corresponding Authors:
Jun Zhang, Xue-Shen Liu
E-mail: junzhang@jlu.edu.cn;liuxs@jlu.edu.cn
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Cite this article:
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 2022 Chin. Phys. B 31 043203
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