Photoluminescence of photonic polaritons

We study the photoluminescence properties of a monolithic optical device constituted by two coupled microcavities. A thin film of tetrakis_4-methoxyphenyl_porphyrin was embedded in one of these two cavities, whereas the other one is a dielectric structure coupled to the first one by means of a LiF/ZnS Bragg mirror. This optical device is the photonic analog of a microcavity embedded quantum well in the strong-coupling regime. We report on photoluminescence spectra obtained exciting incoherently the bottom cavity by its embedded organic layer and detecting light either from the bottom or the top cavity. A quantum statistical approach for interacting quantum systems in the strong-coupling regime reproduces with very good agreement the experimental results.