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| 相对论质量修正效应对超高次谐波的影响 | |
| 引用本文： | 郭福明,陈基根,杨玉军,曾思良.相对论质量修正效应对超高次谐波的影响[J].物理学报,2012,61(17):173202-173202. |
| 作者姓名： | 郭福明 陈基根 杨玉军 曾思良 |
| 作者单位： | 1. 吉林大学原子与分子物理研究所,长春,130012 2. 台州学院物理与电子工程学院物理与材料工程系,台州,318000 3. 北京应用物理与计算数学研究所计算物理重点实验室,北京,100088 |
| 基金项目： | 国家自然科学基金(批准号: 10904006, 11034003, 11105015, 11075023);浙江省自然科学基金(批准号: Y6110578)和中国工程物理研究院科学技术发展基金(批准号: 2011B0102026, 2011A0102007) 的资助课题. |
| 摘 要： | 通过分别求解含时狄拉克方程和含时薛定谔方程, 研究了一维模型原子在相对论超强激光脉冲作用下的超高次谐波发射过程. 研究结果表明: 在弱场强条件下, 相对论的模拟结果可以退化到非相对论的结果; 随着场强的增强, 可以逐渐观察到明显的相对论质量修正效应. 此外, 根据发展的相对论的"三步"模型并结合小波时频分析方法, 分析了谐波平台的截止位置和发射效率. |
| 关 键 词： | 高次谐波 相对论质量修正效应 含时Dirac方程 |
| 收稿时间： | 2012-04-12 |
Mass shift effect on relativistic high-order harmonic generation |
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| Guo Fu-Ming,Chen Ji-Gen,Yang Yu-Jun,Zeng Si-Liang.Mass shift effect on relativistic high-order harmonic generation[J].Acta Physica Sinica,2012,61(17):173202-173202. | |
| Authors: | Guo Fu-Ming Chen Ji-Gen Yang Yu-Jun Zeng Si-Liang |
| Institution: | 1. Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China;2. Department of Physics and Materials Engineering, College of Physics and Electronic Engineering, Taizhou University, Taizhou 318000, China;3. Science and Technology Computation Physics Laboratory, Institute of Applied Physics and Computational Mathematics, Beijing 100088, China |
| Abstract: | By solving the time-dependent Dirac and Schrödinger equations, we investigate the super high-order harmonic generation (HHG) from a one-dimensional model atom in a relativistic intense laser pulse. Our numerical simulations show that the relativistic results can be degraded to non-relativistic ones in the weak laser field, and the clear effect of the relativistic mass-shift can be gradually observed as the increase of the laser field intensity. Furthermore, the cutoff frequency and the emission efficiency of the HHG spectrum are analyzed by the wavelet time-frequency analysis and the relativistic "three-step" model. |
| Keywords: | high harmonic generation relativistic mass-shift time-dependent Dirac equation |
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