Abstract
AbstractWe have developed a model in order to account for the photo‐excitation dynamics of J‐aggregate films and strongly coupled J‐aggregate microcavities. The J‐aggregates are described as a disordered Frenkel exciton system in which relaxation occurs due to the presence of a thermal bath of molecular vibrations. The link between the J‐aggregate film and the microcavities is obtained introducing a model polariton wavefunction mixing cavity photon modes and J‐aggregate superradiant excitons. With the same approach we have calculated both absorption and luminescence spectra for the J‐aggregate film and the photoluminescence of strongly coupled organic microcavities. The model is able to explain the organic microcavities fast relaxation dynamics and polariton luminescence following non resonant pumping starting from the excitonic properties of the optically active layer. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)
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