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H2+分子双H核对高次谐波辐射的贡献
Contributions of two-H nuclei in H2+ to high-order harmonic generation
摘要点击 205  全文点击 38  投稿时间:2016-10-19  修订日期:2016-11-04
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DOI编号  
中文关键词   H2+分子  谐波空间分布  高次谐波  电子运动
英文关键词   H2+ molecule  spatial distribution of the harmonics  high-order harmonic generation  electron motion
基金项目   国家自然科学基金 11504151
作者单位E-mail
冯立强 辽宁工业大学 lqfeng1101@126.com 
中文摘要
    理论研究了H2+分子双H核对高次谐波辐射的贡献。结果表明:在少周期激光场下,由于激光场的反对称性,负向H核辐射谐波强度高于正向H核。随着激光脉宽增大,激光波形趋于对称,因此导致双H核辐射谐波的反对称结构减小。谐波辐射的时频分析图显示,当激光场为正向时(E(t) > 0.0),负向H核辐射谐波强度高于正向H核;当激光场反向时(E(t) < 0.0),正向H核辐射谐波强度高于负向H核。最后,通过分析含时电子波包及H2+的缀饰态给出了电子在双H核之间转移的原因。
英文摘要
    Contributions of two-H nuclei in H2+ to high-order harmonic generation have been theoretically investigated. Result shows that in the few-cycle laser pulse, due to the asymmetry of the laser pulse, the contribution from the negative-H to the harmonic generation is higher than that from the positive-H. With the increase of the pulse duration, the profile of the laser pulse tends to symmetry, and thus leads to the decrease of the asymmetric harmonic distribution from two-H nuclei. Time-frequency analyses of the harmonic spectra show that when the laser field is larger than zero (E(t) > 0.0), the harmonic emission from the negative-H is higher than that from the positive-H; while when the laser field changes its direction (E(t) < 0.0), the harmonic emission from the positive-H is higher than that from the negative-H. Finally, through analyzing the time-dependent wave function and the dressed energies of H2+, we show the reason behind the electron motion/transfer between the two-H nuclei.

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