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Standard optomechanical cooling methods ideally require weak coupling andcavity damping rates which enable the motional sidebands to be well resolved.If the coupling is too large then sideband-resolved cooling is unstable or therotating wave approximation can become invalid. In this work we describe aprotocol to cool a mechanical resonator coupled to a driven optical mode in anoptomechanical cavity, which is also coupled to an optical mode in anotherauxiliary optical cavity, and both the cavities are frequency-modulated. Weshow that by modulating the amplitude of the drive as well, one can execute atype of STIRAP transfer of occupation from the mechanical mode to the lossyauxiliary optical mode which results in cooling of the mechanical mode. We showhow this protocol can outperform normal optomechanical sideband cooling invarious regimes such as the strong coupling and the unresolved sideband limit.

Optomechanical cooling by STIRAP-assisted energy transfer $:$ an alternative route towards the mechanical ground state