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引用本文格式: 冯立强,刘航,刘辉. 分子取向对H2+谐波分布的影响 [J]. 四川大学学报: 自然科学版, 2019, 56: 290~294.
 
分子取向对H2+谐波分布的影响
Alignment angle dependence of H2+ on spatial distribution of harmonic emission
摘要点击 127  全文点击 47  投稿时间:2017-09-13  修订日期:2017-10-16
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DOI编号   
中文关键词   高次谐波  H2+分子离子  谐波空间分布  分子取向角
英文关键词   High-order harmonic generation  H2+ molecular ions  Spatial distribution of harmonic emission  Alignment angle of H2+
基金项目   国家自然科学基金,省自然科学基金
作者单位E-mail
冯立强 辽宁工业大学理学院 lqfeng1101@126.com 
刘航 辽宁工业大学化学与环境工程学院  
刘辉 辽宁工业大学理学院  
中文摘要
    理论研究了H2+分子取向对谐波空间分布的影响. 结果表明:当激光偏振方向与分子轴方向一致时, 谐波辐射满足激光场正向时, 负向H核谐波辐射强度大于正向H核;激光场反向时, 正向H核谐波辐射强度大于负向H核. 随着分子取向角增大, 谐波辐射强度减弱, 尤其正向H核对谐波辐射的贡献明显减小, 因此导致正负向H核的谐波辐射强度差逐渐增大. 最后, 通过研究谐波辐射的时频分析以及电子波包随时间的演化给出了电子在双H核之间运动以及谐波空间分布的原因.
英文摘要
    The alignment angle dependence of H2+ on the spatial distribution of the molecular high-order harmonic generation (MHHG) has been theoretically investigated. The result shows that when the laser polarization direction coincides with the molecular axis, the harmonic emission follows the rules. When the laser field is larger than zero, the MHHG from the negative-H is higher than that from the positive-H; while when the laser field is smaller than zero, the MHHG from the positive-H is higher than that from the negative-H. As the alignment angle of H2+ increases, the intensities of the harmonic spectra decreases. Especially for the case of the harmonic emission from the positive-H, a faster decrease of the harmonics can be found, thus leading to the enhanced intensity difference of the harmonics from the two-H nuclei. Finally, through studying the time-frequency analyses of the MHHG and the time-dependent electronic wave functions, the reasons behind the electron motion and the spatial distribution of the MHHG from the two-H nuclei are shown and discussed.

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