Mechanical synchronization and sideband enhancement in mechanically coupled optomechanical systems
Abstract
Photon-phonon interaction via optical pressure has recently attracted great attention. This research field is called ‘cavity optomechanics’[1]. Since quantum effect can appear in such a macroscopic system, this field is promising for application in quantum information technology and sensing devices. We focus on mechanically coupled many-cavity systems[2] where intra-cavity modes of phonons and photons appear by phonon hopping. Here, we show a mechanical synchronization with different phonon frequencies. Furthermore, we demonstrate sideband enhancement and its propagation by phonon hopping when two lasers drive the system. Our study can be applied to integrated photonic circuits and sensing devices.