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High-order harmonic generation of CO2 with different vibrational modes in an intense laser field |
| Hui Du(杜慧), Hong-Dan Zhang(张宏丹), Jun Zhang(张军), Hai-Feng Liu(刘海凤), Xue-Fei Pan(潘雪飞), Jing Guo(郭静), Xue-Shen Liu(刘学深) |
| Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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Abstract We apply the strong-field Lewenstein model to demonstrate the high-order harmonic generation of CO2 with three vibrational modes (balance vibration, bending vibration, and stretching vibration) driven by an intense laser field. The results show that the intensity of harmonic spectra is sensitive to molecular vibrational modes, and the high harmonic efficiency with stretching vibrational mode is the strongest. The underlying physical mechanism of the harmonic emission can be well explained by the corresponding ionization yield and the time-frequency analysis. Finally, we demonstrate the attosecond pulse generation with different vibrational modes and an isolated attosecond pulse with a duration of about 112 as is generated.
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Received: 23 June 2016
Revised: 18 July 2016
Accepted manuscript online:
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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: Project supported by the National Natural Science Foundation of China (Grant Nos. 61575077, 11271158, and 11574117). |
Corresponding Authors:
Xue-Shen Liu
E-mail: liuxs@jlu.edu.cn
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Cite this article:
Hui Du(杜慧), Hong-Dan Zhang(张宏丹), Jun Zhang(张军), Hai-Feng Liu(刘海凤), Xue-Fei Pan(潘雪飞), Jing Guo(郭静), Xue-Shen Liu(刘学深) High-order harmonic generation of CO2 with different vibrational modes in an intense laser field 2016 Chin. Phys. B 25 113201
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