运动三能级原子与驻波激光场斜交相互作用的理论分析  

Theoretical Analysis of a Moving Three Level Atom Interacting Slantingly with a Standing Wave Laser Field

作　　者：徐信业[1] 王育竹[1] 

机构地区：[1]中国科学院上海光学精密机械研究所量子光学(联合)开放研究实验室

出　　处：《光学学报》1996年第11期1537-1542,共6页Acta Optica Sinica

基　　金：国家自然科学基金

摘　　要：分析了一个运动的三能级原子与一个驻波激光场在斜交相互作用时的动量传递行为。结果表明，当原子和光场由于多普勒效应满足一定条件时，将产生受激拉曼跃迁。如果作用光相对于原子而言为一个“π／２脉冲”光时，那么经过作用后，原子将处于一个相干迭加态，其中一个态与初始态相同；另一个态为新态，并且原子动量增量为两倍单光子反冲动量。把这一机制应用于原子波干涉。A momentum transfer of a moving three level atom interacting slantingly with a standing wave laser field is analysed. The results have shown that a stimulated Raman transition will be dominated, when some conditions are met by both the atom and the light field. If the light field seen by the atom is a “π/2 pulse” light, the atom will be in a coherent superposition state after interaction, the one state is the same as the initial state of the atom, and another state is a new state in which the degrees of atomic internal freedom and the center of mass momentum of the atom are all changed, especially, the momentum is changed by twice single photon recoil momentum. Nevertheless, the probability of the atom in the two states is the same. If this mechanism is used for atomic wave interferometry, it is possible that atomic wave packets are coherently splitted.

关 键 词：受激拉曼跃迁 相干控加态 原子波 驻波 激光场 

分 类 号：O431[机械工程—光学工程]