HeH2+分子谐波辐射的空间分布 |
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引用本文: | 冯立强.HeH2+分子谐波辐射的空间分布[J].原子与分子物理学报,2018,35(6). |
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作者姓名: | 冯立强 |
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作者单位: | 辽宁工业大学 |
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基金项目: | 国家自然科学基金(11504151) |
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摘 要: | 理论研究了HeH2+分子发射高次谐波的空间分布情况。结果表明:分子谐波发射主要集中在He核和H核附近。当核间距离较小时,He核辐射谐波强度要比H核辐射谐波强度高2~3个数量级。当核间距离较大时,He核辐射谐波强度要比H核辐射谐波强度高4~5个数量级。当空间非均匀激光场引入后,谐波截止能量得到延伸,并且,随着空间非均匀激光场位置由负向到正向移动(-100 a.u.到100 a.u.),谐波截止得到进一步延伸。但是He核辐射谐波强度依然大于H核。最后,通过叠加谐波可获得脉宽在60 as的超短脉冲。
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关 键 词: | 激光物理 HeH2+分子 谐波空间分布 高次谐波 阿秒脉冲 |
收稿时间: | 2016/9/6 0:00:00 |
修稿时间: | 2016/9/30 0:00:00 |
Spatial distribution of molecular harmonic generation from HeH2+ |
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Abstract: | Spatial distribution of the harmonic generation from HeH2+ has been theoretically investigated. It shows that the molecular harmonic emissions mainly occur around the He and the H nuclei. At smaller internuclear distance, the harmonic intensity from the He nucleus is 2~3 orders of magnitude higher than that from the H nucleus. At larger internuclear distance, harmonic intensity from the He nucleus is 4~5 orders of magnitude higher than that from the H nucleus. With the introduction of the spatial inhomogeneous laser field, the harmonic cutoff is extended. Moreover, as the spatial position of the inhomogeneous field moving from the -100 a.u. to the 100 a.u., the harmonic cutoff can be further enhanced. But, the harmonic intensity from the He nucleus is still higher than that from the H nucleus. Finally, by properly selecting particular harmonics orders, an ultrashort 60 as pulse can be produced. |
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Keywords: | laser physics HeH2+ molecule spatial distribution of the harmonics high-order harmonic generation attosecond pulse |
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