氢原子在少周期强激光场中阈上电离的电子波包干涉图像

郭志坚; 孙乾

doi:10.3788/CO.20191206.1376

Volume 12 Issue 6

Dec. 2019

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Chinese Optics > 2019 > 12(6): 1376-1384.

GUO Zhi-jian, SUN Qian. Electron wave packet interference images in above-threshold ionization of hydrogen atoms by few-cycle intense laser fields[J]. Chinese Optics, 2019, 12(6): 1376-1384. doi: 10.3788/CO.20191206.1376

Citation:

GUO Zhi-jian, SUN Qian. Electron wave packet interference images in above-threshold ionization of hydrogen atoms by few-cycle intense laser fields[J]. Chinese Optics, 2019, 12(6): 1376-1384. doi: 10.3788/CO.20191206.1376

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Electron wave packet interference images in above-threshold ionization of hydrogen atoms by few-cycle intense laser fields

doi: 10.3788/CO.20191206.1376

GUO Zhi-jian^,,
SUN Qian

College of Electrical Engineering, Longdong University, Qingyang 745000, China

Funds:

National Natural Science Foundation of China 11565018

Innovation Ability Project of Colleges and Universities of Gansu Provincial Department of Education 2019A-112

Doctoral Foundation of Longdong University XYBY1601

Longdong University Youth Science and Technology Innovation Project XYZK1706

More Information

Corresponding author: GUO Zhi-jian, E-mail:zjguo@outlook.com
Received Date: 03 Dec 2018
Rev Recd Date: 30 Jan 2019
Publish Date: 01 Dec 2019

Abstract

Abstract

By using electron wave packet interference methodology, the effects of long-range Coulomb potential and rescattering electrons on the above-threshold ionization of hydrogen atoms in few-cycle intense laser field are investigated. Firstly, using the strong field approximation and Coulomb-Volkov approximation combined with the time window function, the intra- and inter-cycle interference images of hydrogen atoms in a linearly polarized laser field with a wavelength of 800 nm and a pulse width of 5 fs are simulated. It was found that a part of fanlike structure in 2D momentum spectra is formed by the interplay of inter-cycle and intra-cycle interferences under the action of long-range Coulomb. Subsequently, the first principle solution of the Time-Dependent Schrodinger Equation(TDSE) is used to calculate the 2D momentum spectrum of hydrogen atoms under the deep tunneling ionization mechanism. It was found that there are some abvious radial fringes in the 2D momentum spectrum. The results show that the radial fringes are formed by the interference of the rescattering electron wave packets, which are independent of the long-range coulomb potential.
- above-threshold ionization,
- intracycle interferences,
- intercycle interferences,
- two-dimensional momentum spectra,
- photoelectron energy spectra

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References(19)

References

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