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

ISSN号：1674-1056
期刊名称：《中国物理B：英文版》
时间：0
分类：O561.3[理学—原子与分子物理;理学—物理] S9-9[农业科学—水产科学]
作者机构：[1]State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China, [2]HEDPS, Center for Applied Physics and Technology, Peking University, Beijing 100871, China, [3]Institute of Applied Physics and Computational Mathematics, Beijing 100088, China, [4]State Key Laboratory of High Field Laser Physics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China, [5]University of Chinese Academy of Sciences, Beijing 100049, China
相关基金：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）.

作者：林志阳[1,5], 吴明艳[1,5], 全威[1], 柳晓军[1], 陈京[2,3], 程亚[4]

关键词：能量结构, 电离光谱, 红外激光脉冲, 库仑效应, 阈值, 库仑相互作用, 诱导, 半经典模型, low-energy structure, above-threshold ionization, electron-ion Coulomb interaction

中文摘要：

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.

英文摘要：

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.

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