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脉冲激光偏振方向对氮分子高次谐波的影响--基于含时密度泛函理论的模拟
引用本文:崔 磊,顾 斌,滕玉永,胡永金,赵 江,曾祥华.脉冲激光偏振方向对氮分子高次谐波的影响--基于含时密度泛函理论的模拟[J].物理学报,2006,55(9):4691-4694.
作者姓名:崔 磊  顾 斌  滕玉永  胡永金  赵 江  曾祥华
作者单位:(1)北京师范大学低能核物理研究所,北京市辐射中心,北京 100875; (2)扬州大学物理科学与技术学院,复杂性科学中心,扬州 225002
基金项目:江苏省普通高校自然科学研究计划资助的课题.
摘    要:采用含时密度泛函方法,结合赝势模型和电子交换相关作用的广义梯度近似,模拟了氮分子在超强飞秒激光脉冲作用下的高次谐波产生现象,并研究了激光脉冲偏振方向对氮分子高次谐波的影响.结果表明氮分子的高次谐波谱具有典型原子谐波谱的特征;谐波谱强度随着θ(激光偏振方向与分子轴向夹角)的增大而减小.这与J.Itatanl在Nature上报道的实验结果基本一致. 关键词: 含时密度泛函理论 激光偏振方向 高次谐波 氮分子

关 键 词:含时密度泛函理论  激光偏振方向  高次谐波  氮分子
文章编号:1000-3290/2006/55(09)/4691-04
收稿时间:01 17 2006 12:00AM
修稿时间:2006-01-172006-02-21

Effect of different laser polarization direction on high order harmonic generation of nitrogen molecule --A simulation via TDDFT
Cui Lei,Gu Bin,Teng Yu-Yong,Hu Yong-Jin,Zhao Jiang and Zeng Xiang-Hua.Effect of different laser polarization direction on high order harmonic generation of nitrogen molecule --A simulation via TDDFT[J].Acta Physica Sinica,2006,55(9):4691-4694.
Authors:Cui Lei  Gu Bin  Teng Yu-Yong  Hu Yong-Jin  Zhao Jiang and Zeng Xiang-Hua
Institution:1 College of Physics Science and Technology, Complexity Science Center, Yangzhou University, Yangzhou 225002, China;2 Institute of Low Energy Nuclear Physics, Beijing Normal University, Beijing Radiation Center, Beijing 100875, China
Abstract:The high order harmonic generation (HHG) of nitrogen molecule irradiated by ultra-intense femto-second pulsed laser is simulated by the time dependent density functional theory (TDDFT) method with the general gradient approximation of the exchange-correlation energy. The effect of different laser polarization direction on HHG is discussed. The results indicate that the HHG spectrum of N2 has similar characteristics as the typical atom HHG spectrum. With the increase of the angle θ between laser polarization direction and molecular axis, the spectral intensity of HHG decreases, which is in agreement with the experimental result by J.Itatanl published in Nature.
Keywords:TDDFT  laser polarization direction  HHG  nitrogen molecule
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