标题： 自调节多模硅腔光力学 显示英文标题

标题： Self-modulated multimode silicon cavity optomechanics

摘要： 多模腔光力学，其中多个机械自由度耦合到光学腔模式，为探索非线性动力学和工程复杂相互作用提供了丰富的平台。 在本工作中，我们研究了两个具有相似特性的机械模式之间的相互作用，以及由硅中的自由载流子色散和热光效应驱动的腔内功率的自感应非线性调制（自脉冲）。 值得注意的是，自脉冲动力学适应于来自两个机械模式的光力学诱导扰动，从而实现同步泵浦并将其带入由高幅度、自持和相干振荡特征的稳定状态。 这一结果有效地克服了通常在具有相似空间分布和频率尺度的模式中观察到的强模式竞争。 值得注意的是，即使机械频率不满足谐波关系，也能实现这一模式，导致腔内功率动力学呈准周期或混沌特性，而机械模式仍保持相干的高幅度振荡。 这些结果得到了一个能够准确预测系统动力学的数值模型的支持，为在芯片集成的硅平台上生成和控制多声子相干源开辟了新的途径。 显示英文摘要

摘要： Multimode cavity optomechanics, where multiple mechanical degrees of freedom couple to optical cavity modes, provides a rich platform for exploring nonlinear dynamics and engineering complex interactions. In this work, we investigate the interplay between two mechanical modes with similar characteristics and a self-induced nonlinear modulation of intra-cavity power (self-pulsing) driven by free-carrier dispersion and thermo-optic effects in silicon. Notably, the self-pulsing dynamics adapts to the optomechanically induced perturbations from both mechanical modes, enabling simultaneous synchronous pumping and driving them into a stable state characterized by high-amplitude, self-sustained, and coherent oscillations. This result effectively overcomes the strong mode competition typically observed in modes with similar spatial distributions and frequency scales. Remarkably, this regime is achieved even when the mechanical frequencies do not satisfy a harmonic relation, leading to quasi-periodic or chaotic intra-cavity power dynamics, while the mechanical modes maintain coherent, high-amplitude oscillations. These results, supported by a numerical model that accurately predicts the dynamics of the system, open new pathways for the generation and control of multi-phonon coherent sources in chip-integrated silicon platforms.