Chen Jiaojiao, Li Zhuanxia, Luo Xiao-Qing, Xiong Wei, Wang Mingfeng, Li Hai-Chao
Opt Express. 2021 Sep 27;29(20):32639-32648. doi: 10.1364/OE.438114.
Engineering strong single-photon optomechanical couplings is crucial for optomechanical systems. Here, we propose a hybrid quantum system consisting of a nanobeam (phonons) coupled to a spin ensemble and a cavity (photons) to overcome it. Utilizing the critical property of the lower-branch polariton (LBP) formed by the ensemble-phonon interaction, the LBP-cavity coupling can be greatly enhanced by three orders magnitude of the original one, while the upper-branch polariton (UBP)-cavity coupling is fully suppressed. Our proposal breaks through the condition of the coupling strength less than the critical value in previous schemes using two harmonic oscillators. Also, strong Kerr effect can be induced in our proposal. This shows our proposed approach can be used to study quantum nonlinear and nonclassical effects in weakly coupled optomechanical systems.
实现强单光子光机械耦合对于光机械系统至关重要。在此，我们提出一种由与自旋系综和腔（光子）耦合的纳米梁（声子）组成的混合量子系统来克服这一问题。利用系综 - 声子相互作用形成的下支极化激元（LBP）的临界特性，LBP - 腔耦合可比原来增强三个数量级，而上支极化激元（UBP） - 腔耦合则被完全抑制。我们的方案突破了此前使用两个谐振子的方案中耦合强度小于临界值的条件。此外，在我们的方案中还能诱导出强克尔效应。这表明我们提出的方法可用于研究弱耦合光机械系统中的量子非线性和非经典效应。
