High-order harmonic generation of the N2 molecule in two-color circularly polarized laser fields

doi:10.1088/1674-1056/25/4/043202

中国物理B ›› 2016, Vol. 25 ›› Issue (4): 43202-043202.doi: 10.1088/1674-1056/25/4/043202

• SPECIAL TOPIC—Soft matter and biological physics (Review) • 上一篇下一篇

High-order harmonic generation of the N₂ molecule in two-color circularly polarized laser fields

Hui Du(杜慧), Jun Zhang(张军), Shuai Ben(贲帅), Hui-Ying Zhong(钟慧英), Tong-Tong Xu(徐彤彤), Jing Guo(郭静), Xue-Shen Liu(刘学深)

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

收稿日期:2015-11-17 修回日期:2015-12-15 出版日期:2016-04-05 发布日期:2016-04-05
通讯作者: Xue-Shen Liu E-mail:liuxs@jlu.edu.cn
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61575077, 11271158, and 11574117).

High-order harmonic generation of the N₂ molecule in two-color circularly polarized laser fields

Hui Du(杜慧), Jun Zhang(张军), Shuai Ben(贲帅), Hui-Ying Zhong(钟慧英), Tong-Tong Xu(徐彤彤), Jing Guo(郭静), Xue-Shen Liu(刘学深)

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

Received:2015-11-17 Revised:2015-12-15 Online:2016-04-05 Published:2016-04-05
Contact: Xue-Shen Liu E-mail:liuxs@jlu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 61575077, 11271158, and 11574117).

摘要/Abstract

摘要：

The generation of high-order harmonics and the attosecond pulse of the N₂ molecule in two-color circularly polarized laser fields are investigated by the strong-field Lewenstein model. We show that the plateau of spectra is dramatically extended and a continuous harmonic spectrum with the bandwidth of 113 eV is obtained. When a static field is added to the x direction, the quantum path control is realized and a supercontinuum spectrum can be obtained, which is beneficial to obtain a shorter attosecond pulse. The underlying physical mechanism is well explained by the time-frequency analysis and the semi-classical three-step model with a finite initial transverse velocity. By superposing several orders of harmonics in the combination of two-color circularly polarized laser fields and a static field, an isolated attosecond pulse with a duration of 30 as can be generated.

关键词: high-order harmonic generation, two-color circularly polarized laser fields, attosecond pulse

Abstract:

Key words: high-order harmonic generation, two-color circularly polarized laser fields, attosecond pulse

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)

杜慧, 张军, 贲帅, 钟慧英, 徐彤彤, 郭静, 刘学深. High-order harmonic generation of the N₂ molecule in two-color circularly polarized laser fields[J]. 中国物理B, 2016, 25(4): 43202-043202.

Hui Du(杜慧), Jun Zhang(张军), Shuai Ben(贲帅), Hui-Ying Zhong(钟慧英), Tong-Tong Xu(徐彤彤), Jing Guo(郭静), Xue-Shen Liu(刘学深). High-order harmonic generation of the N₂ molecule in two-color circularly polarized laser fields[J]. Chin. Phys. B, 2016, 25(4): 43202-043202.

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High-order harmonic generation of the N₂ molecule in two-color circularly polarized laser fields

High-order harmonic generation of the N₂ molecule in two-color circularly polarized laser fields

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