H2^+解离中电子局域化对激光强度的依赖性  

Intensity Dependence of Electron Localization in the Dissociation of H2^+

作　　者：王茁 童爱红 WANG Zhuo;TONG Aihong(Department of Physics and Mechanical&Electrical Engineering,Hubei University of Education,Wuhan 430205,China)

机构地区：[1]湖北第二师范学院,物理与机电工程学院,湖北武汉430205

出　　处：《信阳师范学院学报（自然科学版）》2020年第4期538-542,共5页Journal of Xinyang Normal University(Natural Science Edition)

基　　金：国家自然科学基金项目(11847155);湖北第二师范学院科研启动经费资助项目(20RC09)。

摘　　要：利用非波恩-奥本海默近似下数值求解含时薛定谔方程(TDSE)的方法,研究了激光强度对强场驱动氢分子离子(H2^+)解离过程中电子局域化的影响.结果显示,电子局域化程度强烈依赖于激光强度.随着激光强度的增大,电子局域化程度呈现先上升后下降的趋势.通过分别研究核波包和电子波包的含时演化,发现这是解离概率在起主要作用.进一步研究显示有效实现电子位置调控的驱动激光场强度范围在4×10^14~1×10^15 W/cm^2.By solving the time-dependent Schr dinger equation(TDSE)in the non-Born Oppenheimer approximation,the influence of laser intensity on the electron localization was investigated in the dissociation of hydrogen molecular ion(H2^+)driven by the strong field.The results reveal the degree of electron localization depends on the laser intensity strongly.The degree of electron localization increases first and then decreases with the increase of laser intensity.By studying the time-dependent evolution of the nuclear and electronic wave packets respectively,it is known that the dissociation probability plays an important role in the process.Furthermore,it is found that the location of the electron can be controlled efficiently by the laser field with the intensity ranged from 4×10^14 to 1×10^15 W/cm^2.

关 键 词：分子解离 激光强度 电子局域化 

分 类 号：O437[机械工程—光学工程]