Polariton Condensation in Organic Semiconductors

Abstract

Because of their bosonic nature, exciton-polaritons can condense into a single macroscopic coherent state under the right conditions. This process is uniquely characterized by its out-of-equilibrium nature, which gives rise to some distinctions when compared to conventional Bose-Einstein condensation. This Chapter begins by describing condensation in general and then describes room-temperature demonstrations of polariton condensation in organic microcavities along with phenomena that have recently been observed in these systems such as long-range spatial coherence, spontaneous vortex formation and dynamic instabilities.