采用左旋和右旋圆偏振光分别作为探测光和耦合光,作用于铯原子62S1/2F=3-62P3/2F′=2简并二能级系统,借助探测光的吸收光谱观察到了由简并二能级中Λ型塞曼子能级结构导致的电磁诱导透明(EIT)现象。同时研究了不同耦合光的强度和失谐对电磁诱导透明的影响。由于在多普勒展宽背景下圆偏振光对塞曼子能级间的光抽运,从而不同塞曼子能级上布居出现明显的差异,电磁诱导透明的作用程度有所不同。而且对于在扫描探测光频率时由于存在速度选择机制使探测光通过铯气室后的吸收谱线发生的畸变作了定性分析。

Employing two lasers as the coupling and probe fields which have opposite circular polarization (σ+ and σ-), electromagnetically induced transparency (EIT) in Λ-type Zeeman sublevels of cesium 62S1/2F=3-62P3/2F′=2 degenerate two-level system has been demonstrated via probe absorption spectra. The effect of the intensity and detuning of different coupling. Laser on EII was also investigated in experiments. Within the Doppler background, optical pumping among Zeeman sub-levels and the population of different Zeeman sub-levels can dominate the intensity of EIT effect. And the physical reason of the rugged spectra are presented qualitatively.