Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse

doi:10.1088/1674-1056/27/2/024206

中国物理B ›› 2018, Vol. 27 ›› Issue (2): 24206-024206.doi: 10.1088/1674-1056/27/2/024206

• ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS • 上一篇下一篇

Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse

Xue-Fei Pan(潘雪飞), Jun Zhang(张军), Shuai Ben(贲帅), Tong-Tong Xu(徐彤彤), Xue-Shen Liu(刘学深)

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

收稿日期:2017-09-17 修回日期:2017-10-13 出版日期:2018-02-05 发布日期:2018-02-05
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 No. 61575077) and the Graduate Innovation Fund of Jilin University (Grant No. 2017107).

Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse

Xue-Fei Pan(潘雪飞), Jun Zhang(张军), Shuai Ben(贲帅), Tong-Tong Xu(徐彤彤), Xue-Shen Liu(刘学深)

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

Received:2017-09-17 Revised:2017-10-13 Online:2018-02-05 Published:2018-02-05
Contact: Xue-Shen Liu E-mail:liuxs@jlu.edu.cn
About author:42.65.Ky; 32.80.Rm; 78.67.Bf
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 61575077) and the Graduate Innovation Fund of Jilin University (Grant No. 2017107).

摘要/Abstract

摘要：

We investigate the spectral redshift of high-order harmonics of the H₂⁺ (D₂⁺) molecule by numerically solving the non-Born-Oppenheimer time-dependent Schrödinger equation (TDSE). The results show that the spectral redshift of high-order harmonics can be observed by adding a weak pulse in the falling part of the trapezoidal laser pulses. Comparing with the H₂⁺ molecule, the shift of high-order harmonic generation (HHG) spectrum for the D₂⁺ molecule is more obvious. We employ the spatial distribution in HHG and time-frequency analysis to illustrate the physical mechanism of the spectral redshift of high-order harmonics.

关键词: high-order harmonic generation, spectral redshift, trapezoidal laser pulse, spatial distribution

Abstract:

Key words: high-order harmonic generation, spectral redshift, trapezoidal laser pulse, spatial distribution

中图分类号: (Frequency conversion; harmonic generation, including higher-order harmonic generation)

42.65.Ky

32.80.Rm (Multiphoton ionization and excitation to highly excited states) 78.67.Bf (Nanocrystals, nanoparticles, and nanoclusters)

潘雪飞, 张军, 贲帅, 徐彤彤, 刘学深. Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse[J]. 中国物理B, 2018, 27(2): 24206-024206.

Xue-Fei Pan(潘雪飞), Jun Zhang(张军), Shuai Ben(贲帅), Tong-Tong Xu(徐彤彤), Xue-Shen Liu(刘学深). Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse[J]. Chin. Phys. B, 2018, 27(2): 24206-024206.

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Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse

Spectral redshift of high-order harmonics by adding a weak pulse in the falling part of the trapezoidal laser pulse

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