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Restraint of spatial distribution in high-order harmonic generation from a model of hydrogen molecular ion |
| Chang-Long Xia(夏昌龙)1, Jun Zhang(张军)2, Xiang-Yang Miao(苗向阳)1, Xue-Shen Liu(刘学深)2 |
1 College of Physics and Information Engineering, Shanxi Normal University, Linfen 041004, China;
2 Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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Abstract The spatial distribution in high-order harmonic generation (HHG) is theoretically investigated by using a few-cycle laser pulse from a two-dimensional model of a hydrogen molecular ion. The spatial distribution in HHG demonstrates that the harmonic spectra are sensitive to the carrier envelope phase and the duration of the laser pulse. The HHG can be restrained by a pulse with the duration of 5 fs in the region from the 90th to 320th order. This characteristic is illustrated by the probability density of electron wave packet distribution. The electron is mainly located near the nucleus along the positive-x direction from 3.0 o.c. to 3.2 o.c., which is an important time to generate the HHG in the plateau area. We also demonstrate the time–frequency distribution in the region of the positive-and negative-x direction to explain the physical mechanism.
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Received: 15 March 2017
Revised: 30 March 2017
Accepted manuscript online:
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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 Nos.11504221,61575077,11404204,and 11447208),the Natural Science Foundation for Young Scientists of Shanxi Province,China (Grant No.2015021023),and Program for the Top Young Academic Leaders of Higher Learning Institutions of Shanxi Province,China. |
Corresponding Authors:
Xiang-Yang Miao, Xue-Shen Liu
E-mail: sxxymiao@126.com;liuxs@jlu.edu.cn
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Cite this article:
Chang-Long Xia(夏昌龙), Jun Zhang(张军), Xiang-Yang Miao(苗向阳), Xue-Shen Liu(刘学深) Restraint of spatial distribution in high-order harmonic generation from a model of hydrogen molecular ion 2017 Chin. Phys. B 26 073201
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