塞曼能级电磁诱导透明暗态的演化

Evolution toward dark state of electromagnetically induced transparency in Zeeman-sublevel

利用数值方法研究了超精细能级分裂的原子系统中电磁诱导透明暗态随时间的演化和驻波光场中稳态布居的空间相关性。考虑圆偏振和线偏振两种极化方案,并且将组合后的结果与简单三能级情况相比较。分析结果表明,圆偏极化方式下暗态的布居分布比线偏极化方式下更接近简单三能级的分析结果,而且圆偏极化方式下的局域化分辨率更好。演化的过程还说明,系统达到稳态需要足够长的相互作用时间。

The evolution of dark state of electromagnetically induced transparency（EIT） and the spatialdependence of the steady-state population in a standing wave in a system exhibiting hyperfine splitting wereinvestigated by using the numerical simulation. Two polarization schemes, the circular polarization and thelinear polarization, were considered. The combined effect of the individual components was compared withthe simple three-level system. Analytical results indicate that the population of the dark state in the circularpolarization modes are closer to the simple three-level situation than in the linear polarization modes, andthe spatial resolution in the circular polarization modes axe better than in the linear polarization modes.The process of evolution also shows that system requires enough interaction time to reach steady-state.