Berlin 2005 – scientific programme
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SYOO: Organic Optoelectronics and Photonics
SYOO 6: Poster
SYOO 6.49: Poster
Monday, March 7, 2005, 18:00–20:00, Poster TU A
ON THE RELAXATION OF THE ENERGY OF CAVITY POLARITONS IN ORGANIC MATERIALS — •Marina Litinskaya1,2, Peter Reineker1, and Vladimir Agranovich2 — 1Department of Theoretical Physics, University of Ulm, 89069 Ulm, Germany — 2Institute for Spectroscopy RAS, Troitsk, Moscow region, 142190, Russia
We discuss the regime of strong light-matter coupling in organic microcavities. In contrast to conventional inorganic microcavities, in these structures typical Rabi splitting energies are huge (up to 0.5 eV at room temperatures), which is important both for fundamental studies and possible applications. We have shown recently, that in such structures the spectrum of elementary excitations has an unusual structure. Namely, the coherent polaritonic states coexist with spatially localized states, and these incoherent excited states form the majority of the excited states in the MC. The incoherent excited states are expected to dominate the relaxation dynamics in the MC. In this work we consider the decay of such an incoherent excited state into a lower-energy coherent polaritonic state via emission of a high-energy intramolecular vibration. We show that under a proper choice of the parameters of the microcavity, this relaxation channel may be effective for the population of the lowest energy polaritonic state, and probably may be used in the studies of possible Bose-Einstein condensation of cavity polaritons.