Vibro-Polaritonic IR Emission in the Strong Coupling Regime

The strong coupling regime of light matter interaction has recently been extended to IR active molecular vibrations coupled to microcavities, resulting in the formation of so-called vibro-polaritonic states. Here we demonstrate the emissivity of such hybrid states. Using thermal excitation, we achieve polaritonic IR emission from a strongly coupled polymer. Thermal excitation of vibro-polaritons, thus, constitutes an original way of establishing sizable excited states populations in strongly coupled systems and opens new routes to the study of interacting vibro-polaritons.