利用高振动态H_2^+增强谐波及脉冲强度  

Enhancement of Harmonic and Pulse Intensity by Using High-Vibrational State of H_2^+

作　　者：高丽 李健 朱爱军 沈志博 刘航[1] GAO Li;LI Jian;ZHU Ai-jun;SHEN Zhi-bo;LIU Hang(School of Chemical and Environmental Engineering, 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

出　　处：《辽宁工业大学学报（自然科学版）》2018年第2期98-100,共3页Journal of Liaoning University of Technology(Natural Science Edition)

基　　金：辽宁省教育厅基金(JL201615405);辽宁工业大学‐锦州市北控水务有限公司环境工程实践教育中心(2015029)

摘　　要：通过求解核与电子耦合的动力学方程,理论研究了H_2^+振动态对谐波辐射以及阿秒脉冲强度的影响。结果表明,随着H_2^+振动态增大,谐波辐射强度明显被增强。随后,通过引入啁啾激光参数,谐波截止能量可以得到有效延伸,并且呈现1个325 eV的超长连续平台区。最后,通过傅里叶变换该平台区的谐波光谱,获得了脉宽仅为20 as的超短单个阿秒脉冲。The effects of the vibrational state in H2^＋ on the harmonic emission yield and the attosecond pulse intensity have been theoretically investigated through solving the electron-nuclear dynamic equation. The results show that as the vibrational state of H2^＋ increases, the harmonic yield can be remarkably enhanced. Further, with the introduction of the chirp parameter, the harmonic cutoff can be effectively extended, showing the bandwidth of 325 e V. Finally, through the Fourier transform of the harmonic spectrum, an isolated attosecond pulse with the pulse duration of 20 as can be produced.

关 键 词：高次谐波 阿秒脉冲 H2^+振动态 

分 类 号：O562.4[理学—原子与分子物理]