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核运动对非奇次谐波产生的影响
Effect of nuclear motion on the generation of the non-odd harmonics
摘要点击 76  全文点击 15  投稿时间:2017-07-14  修订日期:2017-08-17
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DOI编号  
中文关键词   高次谐波  谐波频移  非奇次谐波  核运动
英文关键词   High-order harmonic generation  shifts of the harmonics  the generations of the non-odd harmonics  nuclear motion
基金项目   国家自然科学基金
作者单位E-mail
冯立强 辽宁工业大学 lqfeng1101@126.com 
刘航 辽宁工业大学  
中文摘要
    理论研究了H2+、D2+、T2+辐射高次谐波的特点。结果表明,在核运动影响下,不仅奇次谐波呈现红移现象,而且谐波光谱呈现非奇次谐波。随着核质量增大,奇次谐波频移和非几次谐波强度都减弱。但是随着激脉宽增大,非奇次谐波的产生明显被增强。理论分析表明,谐波频移是由谐波辐射在激光上升和下降区间的非对称性导致的;非奇次谐波是由于分子对称性在较大核间距离处遭破坏产生的。
英文摘要
    The generations of the high-order harmonics from H2+, D2+ and T2+ have been theoretically investigated. The results show that with the introduction of the nuclear dynamics, not only the red-shifts of the odd harmonics can be obtained, but also the non-odd harmonics can be generated. As the nuclear mass increases, the shifts of the odd harmonics and the generations of the non-odd harmonics are both decreased. However, with the increase of the pulse duration, the generations of the non-odd harmonics can be enhanced. Theoretical analyses show that the shifts of the harmonics are caused by the asymmetric contributions of the harmonics from the rising and the falling parts of the laser field. While the generations of the non-odd harmonics are attributed to the broken symmetry of the molecule at the larger internuclear distance.

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