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
作者单位
1 西北师范大学物理与电子工程学院, 甘肃 兰州 730070
2 西北民族大学实验中心, 甘肃 兰州 730030
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.

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