Phonon cooling by an optomechanical heat pump

TL;DR

This paper proposes a cavity optomechanical heat pump that uses a polariton fluid to cool mechanical modes, enabling deep quantum regime cooling from room temperature regardless of phonon frequency.

Contribution

It introduces a novel optomechanical heat pump mechanism utilizing polariton fluids for efficient phonon cooling.

Findings

Enables cooling of arbitrary frequency phonon modes.

Achieves deep quantum regime cooling from room temperature.

Uses external substrate modulation for cooling enhancement.

Abstract

We propose and analyze theoretically a cavity optomechanical analog of a heat pump that uses a polariton fluid to cool mechanical modes coupled to a single pre-cooled phonon mode via external modulation of the substrate of the mechanical resonator. This approach permits to cool phonon modes of arbitrary frequencies not limited by the cavity-optical field detuning deep into the quantum regime from room temperature.