激发态上钠原子的相干囚禁

Population Trapping of Sodium in Excited States

对Ｖ型三能级原子系统与双激光场同时共振产生的能级相干效应进行了研究。计算了各能级上的粒子数分布，实验观测到在相干驻波场中的钠原子被囚禁在激发态上的现象。对比和分析有无干涉效应存在时３Ｓ１／２，Ｆ＝２态上布居数的变化情况。

The atomic coherence induced by simultaneous bilaser resonance in a V-type three-level system has been studied. The distributions of atomic POpulations are obtained by solving motion equations, and the atom trapping of sodium in two upper levels has been observed experimentally. A comparison of the change of populations in the state 3S1/2, F= 2 is performed under conditions of coherence and no coherence.