Figure 1
From: Optomechanically induced transparency in the presence of an external time-harmonic-driving force

Schematic diagram of the optomechanical system with an external driving force.
The system is composed of an optical high-frequency cavity, in which one of the mirrors is fixed but another one is movable with a low frequency ωm and high Q. It is driven by a strong control field with frequency ωl, a weak probe field with frequency ωp and an external driving force with frequency ω, amplitude A and initial phase ϕ1. The external force induces a serial of novel phenomena.