Slow and fast light is an important and fascinating phenomenon in quantum optics. Here, we theoretically study how to achieve the ultraslow and ultrafast light in a passive-active optomechanical system, based on the ideal optomechanically induced transparency (OMIT). Under the conditions of the ideal OMIT, an abnormal (inverted) transparency window will emerge accompanied with a very steep dispersion, resulting that the ultraslow light can be easily achieved at the transparency window by adjusting the dissipation rates of the two cavities, even with usual mechanical linewidth (such as Hz linewidth). Particularly, as the decay rate of the passive cavity tends to the gain rate of the active cavity, the ideal stopped light can be achieved. Similarly, the ultrafast light can be achieved at transparency window by tuning the coupling strength and the decay rates in the system.

慢速和快速光是量子光学中的重要且引人入胜的现象。在这里，我们从理论上研究如何基于理想的光机械感应透明性（OMIT）在被动主动式光机械系统中实现超慢和超快的光。在理想的OMIT条件下，会出现异常（倒置）的透明窗口，并且色散非常陡峭，从而即使在通常情况下，通过调节两个腔的耗散率，也可以轻松地在透明窗口获得超慢光。机械线宽（例如Hz线宽）。特别地，随着无源腔的衰减率趋向于有源腔的增益率，可以实现理想的停止光。相似地，