The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses

doi:10.1088/1674-1056/23/2/023201

中国物理B ›› 2014, Vol. 23 ›› Issue (2): 23201-023201.doi: 10.1088/1674-1056/23/2/023201

• ATOMIC AND MOLECULAR PHYSICS • 上一篇下一篇

The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses

林志阳^{a e}, 吴明艳^{a e}, 全威^a, 柳晓军^a, 陈京^{b c}, 程亚^d

a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
b HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China;
c Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
d State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
e University of Chinese Academy of Sciences, Beijing 100049, China

收稿日期:2013-04-16 修回日期:2013-05-07 出版日期:2013-12-12 发布日期:2013-12-12
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10925420, 11074026, 11174330, and 11274050) and the National Basic Research Program of China (Grant Nos. 2011CB808102 and 2013CB922201).

The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses

Lin Zhi-Yang (林志阳)^{a e}, Wu Ming-Yan (吴明艳)^{a e}, Quan Wei (全威)^a, Liu Xiao-Jun (柳晓军)^a, Chen Jing (陈京)^{b c}, Cheng Ya (程亚)^d

a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;
b HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China;
c Institute of Applied Physics and Computational Mathematics, Beijing 100088, China;
d State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China;
e University of Chinese Academy of Sciences, Beijing 100049, China

Received:2013-04-16 Revised:2013-05-07 Online:2013-12-12 Published:2013-12-12
Contact: Liu Xiao-Jun, Chen Jing E-mail:xjliu@wipm.ac.cn;chen_jing@iapcm.ac.cn
About author:32.80.Rm; 42.50.Hz; 32.80.Wr
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10925420, 11074026, 11174330, and 11274050) and the National Basic Research Program of China (Grant Nos. 2011CB808102 and 2013CB922201).

摘要/Abstract

摘要： We investigate the low-energy structure (LES) in the above-threshold ionization spectrum at a mid-infrared laser wavelength with a semiclassical model. Using a softened Coulomb potential (CP) and changing the softening parameter, we show that though the very low-energy structure (VLES) and high low-energy structure (HLES) are both due to the interaction between the ionic CP and the electron, the two structures have different physical mechanisms: the VLES can be attributed to the electron–ion Coulomb interaction at a rather small distance and the HLES is more likely to be ascribed to the electron–ion Coulomb interaction at a large distance.

关键词: low-energy structure, above-threshold ionization, electron–, ion Coulomb interaction

Abstract: We investigate the low-energy structure (LES) in the above-threshold ionization spectrum at a mid-infrared laser wavelength with a semiclassical model. Using a softened Coulomb potential (CP) and changing the softening parameter, we show that though the very low-energy structure (VLES) and high low-energy structure (HLES) are both due to the interaction between the ionic CP and the electron, the two structures have different physical mechanisms: the VLES can be attributed to the electron–ion Coulomb interaction at a rather small distance and the HLES is more likely to be ascribed to the electron–ion Coulomb interaction at a large distance.

Key words: low-energy structure, above-threshold ionization, electron–, ion Coulomb interaction

中图分类号: (Multiphoton ionization and excitation to highly excited states)

32.80.Rm

42.50.Hz (Strong-field excitation of optical transitions in quantum systems; multiphoton processes; dynamic Stark shift) 32.80.Wr (Other multiphoton processes)

林志阳, 吴明艳, 全威, 柳晓军, 陈京, 程亚. The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses[J]. 中国物理B, 2014, 23(2): 23201-023201.

Lin Zhi-Yang (林志阳), Wu Ming-Yan (吴明艳), Quan Wei (全威), Liu Xiao-Jun (柳晓军), Chen Jing (陈京), Cheng Ya (程亚). The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses[J]. Chin. Phys. B, 2014, 23(2): 23201-023201.

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The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses

The Coulomb effect on a low-energy structure in above-threshold ionization spectra induced by mid-infrared laser pulses

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