标题： 通过耦合光子和磁机械微球实现增强的二阶边带生成和慢光-快光 显示英文标题

标题： Enhanced second-order sideband generation and slow-fast light via coupled opto- and magnomechanical microspheres

摘要： 在这项研究中，我们研究了二次边带生成（SSG）和慢光-快光现象，使用由两个耦合的光子和磁机械微球组成的混合系统，即一个YIG球和一个二氧化硅球。 YIG球包含一个磁子模式和一个由磁致伸缩引起的振动模式，而二氧化硅球则具有一个光学驻波模式和一个通过光机械相互作用耦合的机械模式。 两个球的机械模式在频率上接近，并通过两个微球之间的直接物理接触进行相干耦合。 我们采用微扰方法求解海森堡-朗之万方程，为传输速率和SSG提供了一个解析框架。 利用实验上可行的设置，我们证明了传输速率和SSG强烈依赖于两个微球之间的磁机械、光机械和力学力学耦合强度（MMCS）。 数值结果表明，增加MMCS可以增强传输速率和SSG效率，从而在我们的系统中产生增益。 我们的发现特别表明，SSG的效率可以通过腔体失谐、衰减率和泵浦功率有效控制。 值得注意的是，我们的发现表明，修改系统参数可以改变群延迟，从而调节快光和慢光传播之间的转换，反之亦然。 我们的方案为操控非线性光学特性以及控制光传播提供了指导，应用包括光学开关、信息存储和弱信号的精确测量。 显示英文摘要

摘要： In this research, we investigate second-order sideband generation (SSG) and slow-fast light using a hybrid system comprised of two coupled opto- and magnomechanical microspheres, namely a YIG sphere and a silica sphere. The YIG sphere hosts a magnon mode and a vibration mode induced by magnetostriction, whereas the silica sphere has an optical whispering gallery mode and a mechanical mode coupled via optomechanical interaction. The mechanical modes of both spheres are close in frequency and are coherently coupled by the straightway physical contact between the two microspheres. We use a perturbation approach to solve the Heisenberg-Langevin equations, offering an analytical framework for transmission rate and SSG. Using experimentally feasible settings, we demonstrate that the transmission rate and SSG are strongly dependent on the magnomechanical, optomechanical, and mechanics mechanics coupling strengths (MMCS) between the two microspheres. The numerical results show that increasing the MMCS can enhance both the transmission rate and SSG efficiency, resulting in gain within our system. Our findings, in particular, reveal that the efficiency of the SSG can be effectively controlled by cavity detuning, decay rate, and pump power. Notably, our findings suggest that modifying the system parameters can alter the group delay, thereby regulating the transition between fast and slow light propagation, and vice versa. Our protocol provides guidelines for manipulating nonlinear optical properties and controlling light propagation, with applications including optical switching, information storage, and precise measurement of weak signals.