理论分析振动态H2+偶次谐波的辐射机制  

Theoretical investigationof the even-order harmonics from vibrating H2+

作　　者：刘航[1,2] 李义[3] LIU Hang;LI Yi(School of Chemical and Environmental Engineering,Liaoning University of Technology,Jinzhou 121001,China;State Key Laboratory of Molecular Reaction Dynamics,Dalian Institute of Chemical Physics,Chinese Academy ofSciences,Dalian 116023,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,锦州121001 [2]中国科学院大连化学物理研究所分子反应动力学国家重点实验室,大连116023 [3]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）》2019年第4期713-716,共4页Journal of Sichuan University(Natural Science Edition)

基　　金：国家自然科学基金(11504151);辽宁省博士启动基金(201501123)

摘　　要：理论研究和认证了振动态H2^+偶次谐波的辐射机制.结果表明,偶次谐波是由于谐波辐射在激光上升和下降区间的不对称效应所产生的.具体来说,在低振动态下,偶次谐波主要来源于激光下降区间.随着振动态增大,来源于激光下降区间的偶次谐波强度减弱;但是,一些来源于激光上升区间的偶次谐波逐渐增强.The generations of the even-order harmonics from vibrating H2^+have been theoretically investigated and identified.The results showed that due to asymmetric harmonic emission(asymmetric half-wave profile)on the rising and the falling parts of the laser field,the even-order harmonics can be generated.In detail,for the case of the lower initial vibrational state,the even-order harmonics mainly come from the falling part of the laser field;while as the initial vibrational state increases,the identified even-order harmonics on the falling part of the laser field decreases;while some other even-order harmonics coming from the rising part of the laser field are gradually enhanced.

关 键 词：高次谐波 偶次谐波 振动态H2^+ 激光上升区间 激光下降区间 

分 类 号：O562.4[理学—原子与分子物理]