多能级多普勒系统中的Autler-Townes分裂效应以及宏观效应的影响

项目名称： 多能级多普勒系统中的Autler-Townes分裂效应以及宏观效应的影响

项目编号： No.11274376

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 数理科学和化学

项目作者： 左战春

作者单位： 中国科学院物理研究所

项目金额： 95万元

中文摘要： 我们小组发展的相位共轭多波混频光谱学已经成为一种有效的、高分辨率的光谱学工具。我们已经利用我们发展的缀饰态模型研究了多波混频多普勒系统中的Autler-Townes（AT）分裂以及宏观效应的影响。我们将进一步从理论和实验上研究多普勒系统中的其它非线性效应，包括电磁感应透明效应和共振受激拉曼散射效应并研究二者之间的联系。通过对多普勒展宽系统中的一定的入射光条件下与缀饰能级共振原子的速度进行分析，研究改变入射光的波矢之比对共振存在的影响，并且进一步研究多普勒展宽系统中宏观效应对AT分裂谱的影响，包括原子数目的变化以及极化干涉的影响。我们将以上几种非线性效应从AT分裂的角度进行研究分析，得到统一的全新的理解。进而将这种具有高分辨率的消多普勒AT分裂谱发展为一种新型的可用于测量拉比振荡，分子角动量，原子高激发态间偶极跃迁矩阵元的光谱学工具。

中文关键词： 多普勒展宽；光谱学；Autler-Townes分裂；电磁感应透明；受激拉曼散射

英文摘要： The phase-conjugate multi-wave mixing spectroscopy developed by our group is an effective, high-resolution spectroscopic tool. We have studied the Autler-Townes (AT) splitting effect and the influence of macroscopic effects in multi-wave mixing Doppler systems based on our dressed state model. Theoretically and experimentally, we will further study other nonlinear effects in Doppler-broadened systems, including electromagnetically induced transparency and resonant stimulated Raman scattering and the relation between them. Based on our dressed state model, through analysis of the influence of different atom velocities in Doppler-broadened systems, we will study the influence of the wave-number ratio of the injected light beams on the resonance conditions. We will also study the influence of macroscopic effects on the AT splitting in such systems, including changes in the atomic population and polarization interference. We will analyze the above nonlinear effects from the aspect of AT splitting, to derive a new, generalized interpretation. Furthermore, we will develop the high resolution Doppler-free AT splitting spectroscopy into a new spectroscopic tool for measuring Rabi oscillation, molecular momentum, and the dipole moment between atomic highly-excited states.

英文关键词： Doppler-broadening；spectroscopy；Autler-Townes splitting；Electromagnetically-induced transparency；stimulatted Raman scattering