激光脉宽对H2^+谐波辐射的影响  

Effect of Pulse Duration on Harmonic Emission from H2^+

作　　者：张译文 刘航[1] 冯立强[2] ZHANG Yi-Wen;LIU Hang;FENG Li-qiang(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China;College of Science,Liaoning University of Technology,Jinzhou,121001,China)

机构地区：[1]辽宁工业大学化学与环境工程学院,辽宁锦州121001 [2]辽宁工业大学理学院,辽宁锦州121001

出　　处：《辽宁工业大学学报（自然科学版）》2020年第4期278-280,共3页Journal of Liaoning University of Technology(Natural Science Edition)

摘　　要：理论研究了不同激光脉宽对H2+谐波辐射强度的影响。结果表明:在短脉宽激光驱动下,H2^+谐波辐射主要来源于激光下降区域;而在长脉宽激光驱动下,激光上升区域对H2^+谐波辐射作用增大,并起到主要贡献作用。理论分析表明,H2^+进入电荷共振增强电离区域的差异性是产生上述现象的根本原因。The influence of different pulse durations on harmonic intensity from H2^+was theoretically studied.The results show that under the shorter pulse duration case,the harmonic intensity from H2^+mainly comes from the laser drop region;while,under the longer pulse duration case,the harmonic intensity of H2^+from the laser rising region is increased and it makes a major contribution to the harmonic spectrum.Theoretical analyses show that the difference time of H2+for entering charge resonance enhancement ionization region is the essential reason for the above phenomenon.

关 键 词：高次谐波 激光脉宽 谐波辐射强度 电荷共振增强电离 

分 类 号：O562.4[理学—原子与分子物理]