论文标题
多模腔机电系统中的杂交频率梳子
Hybridized Frequency Combs in Multimode Cavity Electromechanical System
论文作者
论文摘要
带有辐射压力相互作用的腔机电设备引起的Kerr样非线性是有望产生微波频率梳子的候选者。我们构建了基于硅二硝酸二氮基超导腔机电器械，并研究了两种机械模式介导的协同频率梳。在腔内场不稳定性的阈值附近，我们首先显示出独立的频率梳子，其牙齿间距等于每个机械模式频率。在这两种单独的机械模式的重叠边界上，我们根据这两种机械模式之间的空腔场介导的间接耦合观察到频率梳的杂交。频谱线变为不等的间隔，但可以识别为共存频率梳的组合。除了边界之外，梳子还恢复为单模外壳，哪种机械模式频率将取决于模式竞争。我们的工作表明机械模式竞争启用了频率梳齿间距的切换性，并且可以扩展到具有多个非线性的其他设备。
The cavity electromechanical devices with radiation-pressure-interaction induced Kerr-like nonlinearity are promising candidates to generate microwave frequency combs. We construct a silicon-nitride-membrane-based superconducting cavity electromechanical device and study two mechanical modes mediated synergistic frequency combs. Around the threshold of intracavity field instability, we firstly show independent frequency combs with tooth spacing equalling to each mechanical mode frequency. At the overlap boundaries of these two individual mechanical mode mediated instability thresholds, we observe hybridization of frequency combs based on the cavity field mediated indirect coupling between these two mechanical modes. The spectrum lines turn to be unequally spaced but can be recognized into combinations of the coexisting frequency combs. Beyond the boundary, the comb reverts to the single-mode case, and which mechanical mode frequency will the tooth spacing depend on the mode competition. Our work demonstrates mechanical mode competition enabled switchability of frequency comb tooth spacing and can be extended to other devices with multiple nonlinearities.
