Optical-response properties in an atom-assisted optomechanical system with a mechanical pump
Optical-response properties in an atom-assisted optomechanical system with a mechanical pump
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DOI：
10.1088/1361-6455/aa69eb
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发表时间：
2017-04
期刊：
影响因子：
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通讯作者：
Xuejian Sun;Hao Chen;Wenxiao Liu;Hongrong Li
中科院分区：
文献类型：
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作者：
Xuejian Sun;Hao Chen;Wenxiao Liu;Hongrong Li
我们研究了与Λ型三能级原子系综耦合的相干机械泵浦光机械系统（OMS）的光学响应特性。由于光机械和腔原子耦合，光机械感应透明（OMIT）和电磁感应透明（EIT）现象都可以从我们的建议中观察到。在存在相干机械泵的情况下，我们发现探测场的 OMIT 行为表现出相位相关效应，导致从 OMIT 切换到光机械诱导吸收或放大，而 EIT 的特征保持不变。机械泵对 OMIT 和 EIT 行为的明显不同影响确保我们可以同时观察输出探测场的吸收（放大）和透明度。此外，还可以通过调节机械泵的相位和振幅来实现从慢光到快光的可调切换。特别是，原子系综的存在可以进一步调整群延迟，为实现可调谐开关提供额外的灵活性。
We investigate the optical-response properties of a coherent-mechanical pumped optomechanical system (OMS) coupled to a Λ-type three-level atomic ensemble. Due to the optomechanical and the cavity-atom couplings, the optomechanically induced transparency (OMIT) and electromagnetically induced transparency (EIT) phenomena could both be observed from our proposal. In the presence of a coherent mechanical pump, we show that the OMIT behavior of the probe field exhibits a phase-dependent effect, leading to the switch from OMIT to optomechanically induced absorption or amplification, while the feature of EIT remains unchanged. The distinctly different effects of the mechanical pump on OMIT and EIT behavior assure us that the absorption (amplification) and transparency of the output probe field can be simultaneously observed. Moreover, a tunable switch from slow to fast light can also be realized by tuning the phase and amplitude of the mechanical pump. In particular, the presence of the atomic ensemble can further adjust the group delay, providing additional flexibility for achieving the tunable switch.