Enhanced optomechanical interaction in coupled microresonators.

We investigate the optomechanical interaction in two coupled microresonators. Compared to the single resonator optomechanical system where the input light is required to detune from the cavity resonance to generate two asymmetrical sidebands and thus large mechanical damping/amplification, the coupled resonator system can allow both the input light and its frequency sideband to be on resonance. In this configuration, we find that the optomechanical interaction can be enhanced and optically induced energy transfer between different mechanical oscillators is possible.