Ground state cooling of micromechanical oscillators in the unresolved sideband regime induced by a quantum well

TL;DR

This paper proposes a method for ground state cooling of micromechanical oscillators in the unresolved sideband regime by using a quantum well to modify cavity response and inhibit heating processes.

Contribution

It introduces a novel approach employing a quantum well to enable ground state cooling in regimes previously considered unsuitable for such cooling.

Findings

Cooling achieved in unresolved-sideband regime

Quantum well modifies cavity response

Inhibition of Stokes scattering enhances cooling

Abstract

Ground state cooling of micromechanical oscillator is a paradigmatic goal for observing quantum mechanical effects in cavity optomechanics. We study theoretically the ground state cooling of a mechanical oscillator in an optomechanical cavity in presence of a quantum well placed inside the cavity. Due to mode tailoring in presence of the quantum well, the cavity response gets modified and leads to asymmetric heating and cooling processes. This facilitates the cooling of the mechanical oscillator even in the unresolved-sideband regime, via inhibition of Stokes scattering.