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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 |
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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.
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Received: 21 May 2024
Revised: 01 July 2024
Accepted manuscript online: 02 July 2024
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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 No. 12074146) and the Natural Science Foundation of Jilin Province, China (Grant No. 20220101010JC). |
Corresponding Authors:
Jing Guo
E-mail: gjing@jlu.edu.cn
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Cite this article:
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 2024 Chin. Phys. B 33 093201
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