From Excitonic to Photonic Polariton Condensate in a ZnO-Based Microcavity

Feng Li (1, 2) , Laurent Orosz (3) , Olfa Kamoun (4) , Sophie Bouchoule (5) , Christelle Brimont (4) , Pierre Disseix (3) , Thierry Guillet (4) , Xavier Lafosse (5) , Mathieu Leroux (1) , Joël Leymarie (3) , Meletios Mexis (4) , Martine Mihailovic (3) , Gilles Patriarche (5) , François Reveret (3) , Dimitri Solnyshkov (3) , Jesús Zúñiga-Pérez (1) , Guillaume Malpuech (3)

1 CRHEA - Centre de recherche sur l'hétéroepitaxie et ses applications
2 University of Sheffield [Sheffield]
3 LASMEA - Laboratoire des sciences et matériaux pour l'électronique et d'automatique
4 PEPS - Physique de l'Exciton, du Photon et du Spin
5 LPN - Laboratoire de photonique et de nanostructures

We report exciton-polariton condensation in a new family of fully hybrid ZnO based microcavity demonstrating the best-quality ZnO material available (a bulk substrate), a large quality factor (~4000) and large Rabi splittings (~240 meV). Condensation is achieved between 4 and 300 K and for excitonic fractions ranging between 17% and 96 %, which corresponds to a tuning of the exciton-polariton mass, lifetime and interaction constant by one order of magnitude. We demonstrate mode switching between polariton branches allowing, just by controlling the pumping power, to tune the photonic fraction by a factor 4.

Domaines: Optique [physics.optics]

Feng Li, Laurent Orosz, Olfa Kamoun, Sophie Bouchoule, Christelle Brimont, et al.. From Excitonic to Photonic Polariton Condensate in a ZnO-Based Microcavity. Physical Review Letters, 2013, 110, pp.196406. ⟨10.1103/PhysRevLett.110.196406⟩. ⟨hal-00824238⟩