原子光学的最新发展──光的群速度在铯原子气体中可达到真空中光速的310倍

THE LATEST DEVELOPMENT OF ATOMIC-OPTICS

主要介绍光脉冲传输研究方面的最新发展动态，Ｗａｎｇ ＬＪ等人［１］利用辅助增益线性反常色散证实了通过铯原子气体的激光脉冲群速ｖｇ可以达到－３１０（±５）ｃ，同时脉冲的波形也得到了完好的保存．

The latest development of research on the light pulse propagation is introduced.L J Wang et al. used the gain - assisted linear anomalous dispersion to demonstate superluminal light propagation in atomic caesium gas.He showed that the group velocity of a laser pulse in this region exceeds c and can even become negative: vg=-310(±5) c while the shape of the pulse is preserved.