Optical multistability and cooling of a micromechanical mirror induced by radiation pressure in optomechanical cavity

The radiation-pressure induces the movable mirror and the steady-state amplitude of the cavity field displaying an optical multistable behavior is investigated in detail by numerical evaluation in Fabry–Perot optical cavity. We introduce an approximation scheme to derive and analyze the final effective mean phonon number using linearized quantum Langevin equation to describe optomechanical cooling. Our results show that the movable mirror can be cooled close to its ground state with low initial temperature and high mechanical quality factor.