光学学报, 2018, 38 (7): 0702002, 网络出版: 2018-09-05
强激光场作用下He原子低激发态的制备和控制 下载: 821次
Control and Preparation of Low Excited States of He Atoms Interacted with Strong Laser Field
原子与分子物理学 He原子 低激发态 强激光场 原子布居数 atomic and molecular physics He atom low excited state strong laser field atomic population
摘要
基于精确的角动量依赖的模型势,提出了利用激光脉冲驱动He原子产生布居数可控的基态与较低激发态的制备方案。通过数值求解三维含时薛定谔方程得到了相应的波长、峰值强度和脉宽激光参数。数值模拟结果表明,对于2s、2p、3p激发态,激光脉冲结束时的布居数均可达到100%。而对于3s和3d态,由于它们之间的能级差较小,且存在一定的电离几率,布居数最高仅到80%和86%。
Abstract
A method for preparing the ground and low excited states with controllable populations of He atoms driven by a laser pulse is proposed based on an accurate angular-momentum-dependent model potential. The corresponding laser parameters of wavelength, peak intensity and pulse duration are obtained by the numerical solution of the three-dimensional time-dependent Schr dinger equation. The numerical simulation results show that for the 2s, 2p and 3p states, the populations at the end of laser pulse can all reach 100%, while for the states of 3s and 3d, the maximum populations are only 80% and 86%, respectively, because of their very close energy levels and small ionization probabilities.
朱斌, 王国利, 李小勇, 周效信. 强激光场作用下He原子低激发态的制备和控制[J]. 光学学报, 2018, 38(7): 0702002. bin Zhu, Guoli Wang, Xiaoyong Li, Xiaoxin Zhou. Control and Preparation of Low Excited States of He Atoms Interacted with Strong Laser Field[J]. Acta Optica Sinica, 2018, 38(7): 0702002.