Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields

doi:10.1088/1674-1056/26/2/023204

中国物理B ›› 2017, Vol. 26 ›› Issue (2): 23204-023204.doi: 10.1088/1674-1056/26/2/023204

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields

Kai-Li Song(宋凯莉), Wei-Wei Yu(于伟威), Shuai Ben(贲帅), Tong-Tong Xu(徐彤彤), Hong-Dan Zhang(张宏丹), Pei-Ying Guo(郭培莹), Jing Guo(郭静)

1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
2 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China

收稿日期:2016-06-28 修回日期:2016-11-03 出版日期:2017-02-05 发布日期:2017-02-05
通讯作者: Jing Guo E-mail:gjing@jlu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11574117 and11604131).

Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields

Kai-Li Song(宋凯莉)¹, Wei-Wei Yu(于伟威)², Shuai Ben(贲帅)¹, Tong-Tong Xu(徐彤彤)¹, Hong-Dan Zhang(张宏丹)¹, Pei-Ying Guo(郭培莹)¹, Jing Guo(郭静)¹

1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
2 School of Physics and Electronic Technology, Liaoning Normal University, Dalian 116029, China

Received:2016-06-28 Revised:2016-11-03 Online:2017-02-05 Published:2017-02-05
Contact: Jing Guo E-mail:gjing@jlu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 11574117 and11604131).

摘要/Abstract

摘要： By using a two-dimensional Monte-Carlo classical ensemble method, we investigate the double ionization (DI) process of the CS₂ molecule with different bond lengths in an 800-nm intense laser field. The double ionization probability presents a “knee” structure with equilibrium internuclear distance R=2.9245 a.u. (a.u. is short for atomic unit). As the bond length of CS increases, the DI probability is enhanced and the “knee” structure becomes less obvious. In addition, the momentum distribution of double ionized electrons is also investigated, which shows the momentum mostly distributed in the first and third quadrants with equilibrium internuclear distance R=2.9245 a.u. As the bond length of CS increases, the electron momentum becomes evenly distributed in the four quadrants. Furthermore, the energy distributions and the corresponding trajectories of the double-ionized electrons versus time are also demonstrated, which show that the bond length of CS in the CS₂ molecule plays a key role in the DI process.

关键词: intense laser field, non-sequential double ionization, classical ensemble method, the bond length

Abstract: By using a two-dimensional Monte-Carlo classical ensemble method, we investigate the double ionization (DI) process of the CS₂ molecule with different bond lengths in an 800-nm intense laser field. The double ionization probability presents a “knee” structure with equilibrium internuclear distance R=2.9245 a.u. (a.u. is short for atomic unit). As the bond length of CS increases, the DI probability is enhanced and the “knee” structure becomes less obvious. In addition, the momentum distribution of double ionized electrons is also investigated, which shows the momentum mostly distributed in the first and third quadrants with equilibrium internuclear distance R=2.9245 a.u. As the bond length of CS increases, the electron momentum becomes evenly distributed in the four quadrants. Furthermore, the energy distributions and the corresponding trajectories of the double-ionized electrons versus time are also demonstrated, which show that the bond length of CS in the CS₂ molecule plays a key role in the DI process.

Key words: intense laser field, non-sequential double ionization, classical ensemble method, the bond length

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)

宋凯莉, 于伟威, 贲帅, 徐彤彤, 张宏丹, 郭培莹, 郭静. Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields[J]. 中国物理B, 2017, 26(2): 23204-023204.

Kai-Li Song(宋凯莉), Wei-Wei Yu(于伟威), Shuai Ben(贲帅), Tong-Tong Xu(徐彤彤), Hong-Dan Zhang(张宏丹), Pei-Ying Guo(郭培莹), Jing Guo(郭静). Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields[J]. Chin. Phys. B, 2017, 26(2): 23204-023204.

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Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields

Theoretical study on non-sequential double ionization of carbon disulfide with different bond lengths in linearly polarized laser fields

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