Enhancement of cavity cooling of a micromechanical mirror using parametric interactions

Abstract

It is shown that an optical parametric amplifier inside a cavity can considerably improve the cooling of the micromechanical mirror by radiation pressure. The micromechanical mirror can be cooled from room temperature $300\mathrm{K}$ to sub-Kelvin temperatures, which is much lower than what is achievable in the absence of the parametric amplifier. This is further illustrated in case of a precooled mirror, where one can reach millikelvin temperatures starting with about $1\mathrm{K}$. Our work demonstrates the fundamental dependence of radiation pressure effects on photon statistics.