State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, People's Republic of China.
Phys Chem Chem Phys. 2012 Sep 14;14(34):11994-8. doi: 10.1039/c2cp23850k. Epub 2012 Jul 31.
In this paper, a theoretical model is proposed to investigate the molecular rotational state populations pumped by multiple laser pulses through an impulsive Raman process based on second-order perturbation theory and an analytical solution for the dependence of the rotational state populations on the time delays and the relative amplitudes of the multiple laser pulses has been achieved. The results indicate that the molecular rotational state populations can be controlled by precisely manipulating the time delays and the relative amplitudes, which can be significantly enhanced or completely suppressed, and so the molecular rotational wave packet and field-free molecular alignment can be efficiently manipulated.
本文基于二阶微扰理论，提出了一个理论模型，用于研究多脉冲激光通过脉冲拉曼过程泵浦分子转动态布居的情况。文中得到了转动态布居随多脉冲激光的时间延迟和相对振幅的依赖关系的解析解。结果表明，通过精确控制时间延迟和相对振幅，可以对分子转动态布居进行控制，使其得到显著增强或完全抑制，从而有效地操纵分子转动波包和无场分子取向。
