Slow light propagation is an important phenomenon in quantum optics. Here, we theoretically study the properties of slow light in a simple optomechanical system considering an effect of non-rotating wave approximation (NRWA) that was ignored in previous related works. With the NRWA effect, the ultraslow light can be easily achieved at the window of optomechanically induced transparency, especially in unresolved sideband regime. From the theoretical results, we find the upper bound of the time delay is exactly the mechanical ringdown time which can last for several minutes (mHz linewidth) in recent experiments. Additionally, the interesting phenomena of the perfect optomechanically induced transmission and absorption are studied in the system with the NRWA effect. We believe the results can be used to control optical transmission in modern optical networks.

光的缓慢传播是量子光学中的重要现象。在这里，我们从理论上研究了一个简单的光机械系统中的慢光特性，其中考虑了非旋转波近似（NRWA）的影响，而在以前的相关工作中却忽略了该影响。利用NRWA效应，可以在光机械诱导的透明窗口轻松实现超慢光，尤其是在未解决的边带状态下。从理论结果来看，我们发现延时的上限恰好是可以持续几分钟的机械振铃时间。（mHz线宽）在最近的实验中。此外，在具有NRWA效应的系统中研究了理想的光机械诱导的传输和吸收的有趣现象。我们相信结果可用于控制现代光网络中的光传输。