Enhancement of Cavity Cooling of a Micromechanical Mirror Using Parametric Interactions

TL;DR

This paper demonstrates that incorporating an optical parametric amplifier inside a cavity significantly enhances the cooling of a micromechanical mirror via radiation pressure, enabling cooling from room temperature to sub-Kelvin levels.

Contribution

The study introduces a novel method of using an optical parametric amplifier to improve cavity cooling efficiency of micromechanical mirrors.

Findings

Cooling from 300 K to sub-Kelvin temperatures achieved.

Precooled mirrors can reach millikelvin temperatures starting from 1 K.

Photon statistics fundamentally influence radiation pressure effects.

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 K to sub-Kelvin temperatures, which is much lower than what is achievable in the absence of the parametric amplifier. Further if in case of a precooled mirror one can reach millikelvin temperatures starting with about 1 K. Our work demonstrates the fundamental dependence of radiation pressure effects on photon statistics.