首页 > 论文 > 激光与光电子学进展 > 57卷 > 3期(pp:30201--1)

阈上电离谱与双色激光场频率的关系

Dependence of Above-Threshold Ionization Spectra on Frequencies of Two-Color Laser Fields

  • 摘要
  • 论文信息
  • 参考文献
  • 被引情况
  • PDF全文
分享:

摘要

基于非微扰量子电动力学的频域理论,研究了原子在不同频率双色激光场中的阈上电离过程。当两个激光场的频率均远低于原子电离势时,阈上电离谱来自大量通道的干涉结果,两个激光场在电离过程中起到相同的作用。随着激光频率的增加,阈上电离谱逐渐呈现多平台结构,不同平台对应电子吸收不同高频光子的过程。当一个激光场的单个光子能量远大于原子电离势时,两个激光场在电离过程中起到不同的作用,高频激光场决定原子的电离概率,低频激光场决定原子阈上电离谱每个平台的宽度,且平台宽度可以很好地用能量守恒公式给出。

Abstract

Based on the frequency-domain theory in nonperturbative quantum electrodynamics, we investigate the above-threshold ionization of an atom exposed to two-color laser fields of different frequencies. As both the frequencies of two laser fields are lower than the ionization potential of the atom, the above-threshold ionization spectrum comes from quantum interference among many ionization channels, and the two laser fields play same roles in the above-threshold ionization process. As the frequency of one of the two laser fields increases, the above-threshold ionization spectrum shows a multiplateau structure gradually, which is from the contribution of atoms absorbing different photons of high-frequency laser field. As the frequency of one of the two laser fields is much higher than the atomic ionization potential, the two laser fields play different roles in the above-threshold ionization process, where the high-frequency laser field may determine the ionization probability and the low-frequency laser field may determine the width of each plateau that can be predicted by the energy conservation relationship.

广告组6 - 调制器
补充资料

中图分类号:O437

DOI:10.3788/LOP57.030201

所属栏目:原子与分子物理学

基金项目:国家自然科学基金、大学生创新创业训练计划、西安航空学院校级科研基金和校级教学质量工程项目;

收稿日期:2019-09-05

修改稿日期:2019-11-14

网络出版日期:2020-02-01

作者单位    点击查看

金发成:西安航空学院理学院, 陕西 西安 710077
杨慧慧:西安航空学院理学院, 陕西 西安 710077
张桐:西安航空学院理学院, 陕西 西安 710077
陈雨欣:西安航空学院理学院, 陕西 西安 710077

联系人作者:金发成(fchjin@163.com)

备注:国家自然科学基金、大学生创新创业训练计划、西安航空学院校级科研基金和校级教学质量工程项目;

【1】Li M, Liu Y Q, Liu H, et al. Photoelectron angular distributions of low-order above-threshold ionization of Xe in the multiphoton regime [J]. Physical Review A. 2012, 85(1): 013414.

【2】Lin Z Y, Jia X Y, Wang C L, et al. Ionization suppression of diatomic molecules in an intense midinfrared laser field [J]. Physical Review Letters. 2012, 108(22): 223001.

【3】Becker W, Liu X J, Ho P J, et al. Theories of photoelectron correlation in laser-driven multiple atomic ionization [J]. Reviews of Modern Physics. 2012, 84(3): 1011-1043.

【4】Feng F Z, Bai L H, Zheng X X. Nonsequential double ionization of Mg atoms below threshold laser power density [J]. Acta Optica Sinica. 2018, 38(7): 0702003.
冯凤珍, 白丽华, 郑晓晓. 低于阈值激光功率密度下Mg原子的非序列双电离 [J]. 光学学报. 2018, 38(7): 0702003.

【5】Song H, Su N, Chen G. Influence of intensity ratio of two-beam pulses on atomic ionization and high harmonic generation in non-symmetric polarization control scheme [J]. Acta Optica Sinica. 2018, 38(12): 1219001.
宋浩, 苏宁, 陈高. 不对称偏振控制方案中两束脉冲强度比改变对原子电离及高次谐波产生的影响 [J]. 光学学报. 2018, 38(12): 1219001.

【6】Pham V N T, Tolstikhin O I, Morishita T. Images of molecular orbitals in strong-field photoelectron momentum distributions generated by circularly polarized pulses [J]. Physical Review A. 2019, 99(1): 013428.

【7】Tian Y Y, Wei S S, Guo F M, et al. Effect of carrier envelope phase on the above threshold ionization under resonant condition [J]. Acta Physica Sinica. 2013, 62(15): 153202.
田原野, 魏珊珊, 郭福明, 等. 共振条件下载波包络相位效应对阈上电离谱的影响 [J]. 物理学报. 2013, 62(15): 153202.

【8】Guo Z J, Sun Q. Interference effect in above-threshold ionization of hydrogen atom by intense few-cycle laser fields [J]. Laser & Optoelectronics Progress. 2019, 56(12): 120202.
郭志坚, 孙乾. 氢原子在少周期强激光场中阈上电离的干涉效应 [J]. 激光与光电子学进展. 2019, 56(12): 120202.

【9】Guo Z J, Sun Q. Electron wavepacket interference patterns in above-threshold ionization by intense laser fields [J]. Laser & Optoelectronics Progress. 2019, 56(8): 080201.
郭志坚, 孙乾. 强场阈上电离中的电子波包干涉图像 [J]. 激光与光电子学进展. 2019, 56(8): 080201.

【10】Leng Y X. Shanghai superintense ultrafast laser facility [J]. Chinese Journal of Lasers. 2019, 46(1): 0100001.
冷雨欣. 上海超强超短激光实验装置 [J]. 中国激光. 2019, 46(1): 0100001.

【11】Chou Y, Li P C, Ho T S, et al. Optimal control of high-order harmonics for the generation of an isolated ultrashort attosecond pulse with two-color midinfrared laser fields [J]. Physical Review A. 2015, 91(6): 063408.

【12】Liu C, Gong S, Li R, et al. Coherent control in the generation of harmonics and hyper-Raman lines from a strongly driven two-level atom [J]. Physical Review A. 2004, 69(2): 023406.

【13】Gryzlova E V. Grum-Grzhimailo A N, Staroselskaya E I, et al. Quantum coherent control of the photoelectron angular distribution in bichromatic-field ionization of atomic neon [J]. Physical Review A. 2018, 97(1): 013420.

【14】Zhao X, Wei H, Wu Y, et al. Phase-retrieval algorithm for the characterization of broadband single attosecond pulses [J]. Physical Review A. 2017, 95(4): 043407.

【15】Radcliffe P, Arbeiter M, Li W B, et al. Atomic photoionization in combined intense XUV free-electron and infrared laser fields [J]. New Journal of Physics. 2012, 14(4): 043008.

【16】Guo D S. Drake G W F. Stationary solutions for an electron in an intense laser field. II. Multimode case [J]. Journal of Physics A: Mathematical and General. 1992, 25(20): 5377-5394.

【17】Gell-Mann M, Goldberger M L. The formal theory of scattering [J]. Physical Review. 1953, 91(2): 398-408.

【18】Jin F, Yang H, Wang B, et al. Angular resolved above-threshold ionization spectrum of an atom in IR+XUV orthogonally polarized two-color laser fields [J]. Optics Express. 2019, 27(15): 20754-20762.

【19】Jin F C, Tian Y Y, Chen J, et al. Nonsequential double ionization of helium in IR+XUV two-color laser fields: collision-ionization process [J]. Physical Review A. 2016, 93(4): 043417.

【20】Zhang K, Chen J, Hao X L, et al. Terracelike structure in the above-threshold-ionization spectrum of an atom in an IR+XUV two-color laser field [J]. Physical Review A. 2013, 88(4): 043435.

【21】Liu M, Guo Y C, Wang B B. Dependence of above-threshold ionization spectrum on polarization directions of two-color laser fields [J]. Chinese Physics B. 2015, 24(7): 073201.

【22】Maquet A, Ta?eb R. Two-colour IR+XUV spectroscopies: the “soft-photon approximation” [J]. Journal of Modern Optics. 2007, 54(13/14/15): 1847-1857.

引用该论文

Jin Facheng,Yang Huihui,Zhang Tong,Chen Yuxin. Dependence of Above-Threshold Ionization Spectra on Frequencies of Two-Color Laser Fields[J]. Laser & Optoelectronics Progress, 2020, 57(3): 030201

金发成,杨慧慧,张桐,陈雨欣. 阈上电离谱与双色激光场频率的关系[J]. 激光与光电子学进展, 2020, 57(3): 030201

您的浏览器不支持PDF插件,请使用最新的(Chrome/Fire Fox等)浏览器.或者您还可以点击此处下载该论文PDF