Interference of harmonics emitted by different tunneling momentum channels in laser fields

doi:10.1088/1674-1056/ad5d95

中国物理B ›› 2024, Vol. 33 ›› Issue (9): 93201-093201.doi: 10.1088/1674-1056/ad5d95

Interference of harmonics emitted by different tunneling momentum channels in laser fields

Ling-Yu Zhang(张玲玉)¹, Zhuo-Xuan Xie(谢卓璇)¹, Can Wang(王灿)¹, Xin-Lei Ge(葛鑫磊)², and Jing Guo(郭静)^1,†

1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
2 College of Physical Science and Technology, Bohai University, Jinzhou 121013, China

收稿日期:2024-05-21 修回日期:2024-07-01 接受日期:2024-07-02 出版日期:2024-09-15 发布日期:2024-08-27
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 No. 12074146) and the Natural Science Foundation of Jilin Province, China (Grant No. 20220101010JC).

Interference of harmonics emitted by different tunneling momentum channels in laser fields

Ling-Yu Zhang(张玲玉)¹, Zhuo-Xuan Xie(谢卓璇)¹, Can Wang(王灿)¹, Xin-Lei Ge(葛鑫磊)², and Jing Guo(郭静)^1,†

1 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;
2 College of Physical Science and Technology, Bohai University, Jinzhou 121013, China

Received:2024-05-21 Revised:2024-07-01 Accepted:2024-07-02 Online:2024-09-15 Published:2024-08-27
Contact: Jing Guo E-mail:gjing@jlu.edu.cn
Supported by:
Project supported by the National Natural Science Foundation of China (Grant No. 12074146) and the Natural Science Foundation of Jilin Province, China (Grant No. 20220101010JC).

摘要/Abstract

摘要： By numerically solving the semiconductor Bloch equation (SBEs), we theoretically study the high-harmonic generation of ZnO crystals driven by one-color and two-color intense laser pulses. The results show the enhancement of harmonics and the cut-off remains the same in the two-color field, which can be explained by the recollision trajectories and electron excitation from multi-channels. Based on the quantum path analysis, we investigate contribution of different ranges of the crystal momentum $k$ of ZnO to the harmonic yield, and find that in two-color laser fields, the intensity of the harmonic yield of different ranges from the crystal momentum makes a big difference and the harmonic intensity is depressed from all $k$ channels, which is related to the interferences between harmonics from symmetric $k$ channels.

关键词: high-order harmonic generation, the semiconductor Bloch equation, $k$-resolved inter-band harmonic spectrum, four-step semiclassical model

Abstract: By numerically solving the semiconductor Bloch equation (SBEs), we theoretically study the high-harmonic generation of ZnO crystals driven by one-color and two-color intense laser pulses. The results show the enhancement of harmonics and the cut-off remains the same in the two-color field, which can be explained by the recollision trajectories and electron excitation from multi-channels. Based on the quantum path analysis, we investigate contribution of different ranges of the crystal momentum $k$ of ZnO to the harmonic yield, and find that in two-color laser fields, the intensity of the harmonic yield of different ranges from the crystal momentum makes a big difference and the harmonic intensity is depressed from all $k$ channels, which is related to the interferences between harmonics from symmetric $k$ channels.

Key words: high-order harmonic generation, the semiconductor Bloch equation, $k$-resolved inter-band harmonic spectrum, four-step semiclassical model

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)

Ling-Yu Zhang(张玲玉), Zhuo-Xuan Xie(谢卓璇), Can Wang(王灿), Xin-Lei Ge(葛鑫磊), and Jing Guo(郭静). Interference of harmonics emitted by different tunneling momentum channels in laser fields[J]. 中国物理B, 2024, 33(9): 93201-093201.

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Interference of harmonics emitted by different tunneling momentum channels in laser fields

Interference of harmonics emitted by different tunneling momentum channels in laser fields

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