Accueil du site Séminaires Séminaire NANO

Séminaire NANO

Mardi 9 Septembre à 9h30,
Salle Rémy Lemaire, K223

Oratrice : Regine Frank, Institute of Theoretical Physics, (Eberhard-Karls University of Tübingen)
"Non-equilibrium AC Stark shift and exciton-polariton lasing in ZnO Mie resonators"

abstract :

Floquet-Keldysh non-equilibrium dynamical mean field calculations (DMFT) with an iterative perturbative solver (IPT) for high pump-power are presented that induce Stark states and a vanishing Mott-Hubbard gap within ZnO bulk and ZnO nano-cavities. Our model predicts unusal broadening of bands in systems like ZnO random lasers. This can be explained as an exciton-polariton coupling within the single ZnO cylinders meeting the optical Mie resonance which consequently leads to strong higher order non-linearities. Extraordinary enhancement of the lifetime of polaritonic states within the gap can lead to stable lasing modes and gain narrowing. The results are compared to recent experiments.

Dans la même rubrique

© Institut Néel 2012 l Webdesign l Propulsé par spip l Dernière mise à jour : vendredi 16 mars 2018 l