Volume 12 Issue 6
Dec.  2019
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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

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

doi: 10.3788/CO.20191206.1376
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
  • 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.

     

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