Polariton condensates at room temperature Auteur(s): Guillet T., Brimont C. (Article) Publié: Comptes Rendus Physique, vol. 17 p.946-956 (2016) Texte intégral en Openaccess : Ref HAL: hal-01398056_v1 Ref Arxiv: 1603.05093 DOI: 10.1016/j.crhy.2016.07.002 WoS: WOS:000384759600010 Ref. & Cit.: NASA ADS Exporter : BibTex | endNote 13 Citations Résumé: We review the recent developments of the polariton physics in microcavities featuring the exciton-photon strong coupling at room-temperature, and leading to the achievement of room-temperature polariton condensates. Such cavities embed active layers with robust excitons that present a large binding energy and a large oscillator strength, i.e. wide bandgap inorganic or organic semiconductors, or organic molecules. These various systems are compared, in terms of figures of merit and of common features related to their strong oscillator strength. The various demonstrations of polariton laser are compared, as well as their condensation phase diagrams. The room-temperature operation indeed allows a detailed investigation of the thermodynamic and out-of-equilibrium regimes of the condensation process. The crucial role of the spatial dynamics of the condensate formation is discussed, as well as the debated issue of the mechanism of stimulated relaxation from the reservoir to the condensate under non-resonant excitation. Finally the prospects of polariton devices are presented. |