  We explore whether localized surface plasmon polariton modes can transfer
heat between molecules placed in the hot spot of a nanoplasmonic cavity through
optomechanical interaction with the molecular vibrations. We demonstrate that
external driving of the plasmon resonance indeed induces an effective
molecule-molecule interaction corresponding to a new heat transfer mechanism,
which can even be more effective in cooling the hotter molecule than its
heating due to the vibrational pumping by the plasmon. This novel mechanism
allows to actively control the rate of heat flow between molecules through the
intensity and frequency of the driving laser.
