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Chin. Phys. B, 2017, Vol. 26(4): 043201    DOI: 10.1088/1674-1056/26/4/043201
ATOMIC AND MOLECULAR PHYSICS Prev   Next  

Semiclassical investigation of Coulomb focusing effects in atomic above-threshold ionization with elliptically polarized laser fields

Chuan-Liang Wang(王传亮)1, Li-Xin Xia(夏立新)1, Hong-Bin Yao(姚洪斌)2, Wen-Liang Li(李文亮)2
1 School of Physics and Electrical Engineering, Kashgar University, Kashgar 844006, China;
2 Department of Physics, Xinjiang Institute of Engineering, Urumqi 830091, China
Abstract  

We investigate atomic above-threshold ionization in elliptically polarized strong laser fields with a semiclassical approach. With increasing laser intensity, the Coulomb focusing (CF) effects are found to become stronger in both parallel and perpendicular directions with respect to the polarization plane. The dependence of CF effects on tunnel exit, initial transverse momentum distribution and laser electric field is analyzed. It was revealed that the effects of tunnel exit are most prominent with variation of the laser intensity, and the other two factors both play non-negligible roles. Our results provide a deeper insight to the recent experiments of Coulomb asymmetry [Shafir D, et al., 2013 Phys. Rev. Lett. 111 023005 and Li M, et al., 2013 Phys. Rev. Lett. 111 023006].

Keywords:  above-threshold ionization      Coulomb focusing effect      semiclassical method      elliptically polarized laser fields  
Received:  13 November 2016      Revised:  22 January 2017      Accepted manuscript online: 
PACS:  32.80.Fb (Photoionization of atoms and ions)  
  31.15.xg (Semiclassical methods)  
  34.80.Dp (Atomic excitation and ionization)  
Fund: 

Project supported by the National Natural Science Foundation of China (Grant Nos. 11547218, 11564020, and 11504314).

Corresponding Authors:  Wen-Liang Li     E-mail:  wenliangli@vip.126.com

Cite this article: 

Chuan-Liang Wang(王传亮), Li-Xin Xia(夏立新), Hong-Bin Yao(姚洪斌), Wen-Liang Li(李文亮) Semiclassical investigation of Coulomb focusing effects in atomic above-threshold ionization with elliptically polarized laser fields 2017 Chin. Phys. B 26 043201

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