Transparency and tunable slow and fast light in a nonlinear optomechanical cavity.

Transparency and tunable slow and fast light in a nonlinear optomechanical cavity.
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非线性光机械腔中的透明且可调的慢光和快光

DOI:
10.1038/srep35090
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发表时间:
2016-10-11
期刊:
影响因子:
4.6
通讯作者:
Chen A
Chen A
中科院分区:
综合性期刊3区
文献类型:
--
作者:
Li L;Nie W;Chen A

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本文从理论上研究了在简并光参量放大器(OPA)和高阶受激原子系综的非线性光力学腔中输出场和可调慢光和快光的光学响应。研究表明,类似于简并OPA的高阶激发原子作为非线性介质,引起探针场吸收光谱的附加倾角。机械振荡器的相干性导致探针场光谱中的吸收峰发生分裂,从而在输出探针场中产生光机械诱导透明(OMIT)现象。特别是,简并OPA和高阶受激原子之间的非线性关系可以显著影响透明窗的宽度,为控制光学性质提供了额外的灵活性。此外,在简并OPA的存在下,探头场的光响应特性变得相敏,从而实现了从慢光到快光的可调切换。
We investigate theoretically the optical response of the output field and the tunable slow and fast light in a nonlinear optomechanical cavity with a degenerate optical parametric amplifier (OPA) and a higher order excited atomic ensemble. Studies show that the higher-order-excitation atom which is similar to the degenerate OPA that acts as a nonlinear medium, induces an additional dip in absorption spectrum of the probe field. The coherence of the mechanical oscillator leads to split the peak in absorption in the probe field spectrum so that the phenomenon of optomechanically induced transparency (OMIT) is generated from the output probe field. In particular, the presence of nonlinearities with the degenerate OPA and the higher order excited atoms can affect significantly the width of the transparency windows, providing an additional flexibility for controlling optical properties. Furthermore, in the presence of the degenerate OPA, the optical-response properties for the probe field become phase-sensitive so that a tunable switch from slow to fast light can be realized.
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