Simultaneous radiation pressure induced heating and cooling of an opto-mechanical resonator

TL;DR

This paper demonstrates a novel method to simultaneously amplify one mechanical resonance while cooling another in a micro-mechanical resonator using dual optical modes, enhancing control over mechanical vibrations.

Contribution

It introduces a technique to achieve concurrent heating and cooling of different mechanical modes via radiation pressure in a single resonator.

Findings

Successful simultaneous amplification and cooling of mechanical resonances.

Utilization of two closely spaced optical whispering gallery modes.

Enhanced control over mechanical vibrations in opto-mechanical systems.

Abstract

Cavity opto-mechanics enabled radiation-pressure coupling between optical and mechanical modes of a micro-mechanical resonator gives rise to dynamical backaction, enabling amplification and cooling of mechanical motion. Due to a combination of large mechanical oscillations and necessary saturation of amplification, the noise floor of the opto-mechanical resonator increases, rendering it ineffective at transducing small signals, and thereby cooling another mechanical resonance of the system. Here we show amplification of one mechanical resonance in a micro-mechanical ring resonator while simultaneously cooling another mechanical resonance by exploiting two closely spaced optical whispering gallery mode cavity resonances.