We propose a platform for robust and tunable non-reciprocal phonon transport based on arrays of optomechanical microtoroids. In our approach, time-reversal symmetry is broken by the interplay of photonic spin–orbit coupling, engineered using a state-of-the-art geometrical approach, and the optomechanical interaction. We demonstrate the topologically protected nature of this system by investigating its robustness to imperfections. This type of system could find application in phonon-based information storage and signal processing devices.

中文翻译：

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机械阵列中不可逆的拓扑声子

我们提出了一个基于光机械微环形阵列的鲁棒且可调的不可逆声子传输平台。在我们的方法中，时间反转的对称性被光子自旋-轨道耦合的相互作用打破了，光子自旋-轨道耦合是使用最先进的几何方法和光机相互作用来设计的。通过研究其对缺陷的鲁棒性，我们证明了该系统的拓扑保护性质。这种类型的系统可以在基于声子的信息存储和信号处理设备中找到应用。