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.
@article{arxiv.1507.07337,
title = {Phonon cooling by an optomechanical heat pump},
author = {Ying Dong and F. Bariani and P. Meystre},
journal= {arXiv preprint arXiv:1507.07337},
year = {2015}
}