相干诱导冷原子微腔中的动态光存储

Dynamic light storage in coherently induced cavity of cold atoms

将行波耦合激光、驻波光栅激光和静磁场作用于一个超冷原子系综,获得了由两个Bragg反射区和一个电磁感应透明区构成的动态可控光学微腔。对耦合激光、光栅激光和静磁场进行时间调制,将一个弱探测激光送入这一相干诱导光学微腔,使其形成周期振荡,然后再根据需要在一定时间延迟之后将其导出,将这一伴随着较弱能量损耗的探测脉冲受限传播过程视为一个有效的动态光存储机制。对提出的信息存储机制进行了数值模拟,讨论了它的优点和实用价值,提出了它的发展前景。

By applying a traveling-wave coupling field, a standing-wave grating field, and a static magnetic field to a cold atomic ensemble, a dynamically controlled cavity consisting of two Bragg regions of high reflection and an electromagnetically induced transparency region with high transmission is realized. With modulating all the three fields in time, a weak probe pulse is sent into the coherently induced optical cavity to achieve several periodic oscillations and then it is retrieved after a short time. This physical phenomenon is accompa- nied with little energy loss and can be regarded as an efficient scheme for dynamic light storage. This paper simulates the dynamie light storage scheme, discusses numerically its advantages and presents the developing trend of the scheme.