Colombano M F, Arregui G, Capuj N E, Pitanti A, Maire J, Griol A, Garrido B, Martinez A, Sotomayor-Torres C M, Navarro-Urrios D
Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and The Barcelona Institute of Science and Technology, Campus UAB, Bellaterra, 08193 Barcelona, Spain.
Dept. de Fìsica, Universitat Autònoma de Barcelona, 08193 Bellaterra, Spain.
Phys Rev Lett. 2019 Jul 3;123(1):017402. doi: 10.1103/PhysRevLett.123.017402.
The synchronization of coupled oscillators is a phenomenon found throughout nature. Mechanical oscillators are paradigmatic examples, but synchronizing their nanoscaled versions is challenging. We report synchronization of the mechanical dynamics of a pair of optomechanical crystal cavities that, in contrast to previous works performed in similar objects, are intercoupled with a mechanical link and support independent optical modes. In this regime they oscillate in antiphase, which is in agreement with the predictions of our numerical model that considers reactive coupling. We also show how to temporarily disable synchronization of the coupled system by actuating one of the cavities with a heating laser, so that both cavities oscillate independently. Our results can be upscaled to more than two cavities and pave the way towards realizing integrated networks of synchronized mechanical oscillators.
耦合振荡器的同步是一种在自然界中普遍存在的现象。机械振荡器就是典型的例子，但要使它们的纳米尺度版本实现同步却具有挑战性。我们报告了一对光机械晶体腔的机械动力学同步情况，与之前在类似物体上进行的工作不同，这对光机械晶体腔通过机械链路相互耦合，并支持独立的光学模式。在这种情况下，它们以反相振荡，这与我们考虑反应性耦合的数值模型的预测结果一致。我们还展示了如何通过用加热激光驱动其中一个腔来暂时禁用耦合系统的同步，从而使两个腔都能独立振荡。我们的结果可以扩展到两个以上的腔，并为实现同步机械振荡器的集成网络铺平道路。
