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arXiv 1805.06166quant-phcond-mat.mes-hall
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四模光机环中增强的非线性相互作用效应

Enhanced nonlinear interaction effects in a four-mode optomechanical ring

Li-Jing Jin, Jing Qiu, Stefano Chesi, Ying-Dan Wang

摘要:

利用基于Keldysh Green函数方法的微扰处理,研究了四模光机械环中非线性相互作用效应的共振增强。在这样一个系统中,我们确定了五种不同类型的共振散射之间的未扰动极化激元模式,诱导的非线性光机械相互作用。通过计算腔态密度和光机械诱导透明信号,我们发现最大的非线性效应是由涉及两个声子类极化激元的衰减过程引起的。与传统的双模光机系统相比,即使在单光子耦合比腔阻尼小得多的情况下,我们提出的系统也可以表现出突出的非线性特征。

英文摘要:

With a perturbative treatment based on the Keldysh Green's function technique, we study the resonant enhancement of nonlinear interaction effects in a four-mode optomechanical ring. In such a system, we identify five distinct types of resonant scattering between unperturbed polariton modes, induced by the nonlinear optomechanical interaction. By computing the cavity density of states and optomechanical induced transparency signal, we find that the largest nonlinear effects are induced by a decay process involving the two phonon-like polaritons. In contrast to the conventional two-mode optomechanical system, our proposed system can exhibit prominent nonlinear features even in the regime when the single-photon coupling is much smaller than the cavity damping.

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