H_(2)^(+)核间距对单阶谐波增强的影响  

Internuclear distance effect of H_(2)^(+) on the single-order harmonic enhancement

作　　者：徐翠艳[1] 冯立强[1] XU Cui-Yan;FENG Li-Qiang(College of Science,Liaoning University of Technology,Jinzhou 121001,China)

机构地区：[1]辽宁工业大学理学院,锦州121001

出　　处：《四川大学学报（自然科学版）》2022年第3期123-126,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：辽宁省自然科学基金面上项目(2019-MS-167);辽宁省教育厅青年项目(LJKQZ2021138)。

摘　　要：本文理论研究了在特定激光波形下H_(2)^(+)核间距对单阶谐波增强的影响.研究结果表明,当特定激光波形驱动原子时,谐波光谱可以呈现单阶谐波强度增强;但是,当用相同激光波形驱动H_(2)^(+)时,单阶谐波强度增强的现象与H_(2)^(+)核间距离有关.具体来说,当H_(2)^(+)在平衡位置时,H_(2)^(+)谐波光谱呈现单阶谐波增强现象;当H_(2)^(+)核间距在3~7 a.u.变化时,单阶谐波增强现象消失;当H_(2)^(+)核间距大于8 a.u.时,单阶谐波增强会再次出现.理论分析表明,多通道谐波干涉是导致H_(2)^(+)单阶谐波强度变化的原因.The effect of internuclear distance of H_(2)^(+) on the single-order harmonic enhancement driven by the specific laser waveform has been studied theoretically.The results show that when the atom is driven by the specific laser waveform,the single-order harmonic enhancement can be found on the harmonic spectrum.However,when H_(2)^(+) is driven by the same waveform,the single-order harmonic enhancement is related to the internuclear distance of H_(2)^(+).Particularly,when H_(2)^(+) is at its equilibrium position,the single-order harmonic enhancement can be found on the harmonic spectrum.When the internuclear distance of H_(2)^(+) changes from 3 a.u.to 7 a.u.,the single-order harmonic enhancement disappears.When the internuclear distance of H_(2)^(+) is greater than 8 a.u.,the single-order harmonic enhancement will reappear.Theoretical analyses show that the multichannel harmonic interference is responsible for the change of the single-order harmonic intensity.

关 键 词：高次谐波 核间距 单阶谐波强度 多通道谐波干涉 

分 类 号：O562.4[理学—原子与分子物理]