Ref HAL: hal-01308220_v1
Ref Arxiv: 1510.06716
DOI: 10.1103/PhysRevB.92.235308
WoS: 000367064700005
Ref. & Cit.: NASA ADS
Exporter : BibTex | endNote
7 Citations
Résumé:

The formation and propagation of a polariton condensate under tightly focused excitation is investigated in a ZnO microcavity both experimentally and theoretically. 2D near-field and far-field images of the condensate are measured under quasi-continuous non-resonant excitation. The corresponding spatial profiles are compared to a model based on the Gross-Pitaevskii equation under cylindrical geometry. This work allows to connect the experiments performed with a small excitation laser spot and the previous kinetic models of condensation in a 2D infinite microcavity, and to determine the relevant parameters of both the interaction and the relaxation between the reservoir and the condensate. Two main parameters are identified: the exciton-photon detuning through the polariton effective mass and the temperature, which determines the efficiency of the relaxation from the reservoir to the condensate.

Commentaires: 13 pages, 3 tables and 9 figures. Réf Journal: Phys. Rev. B 92, 235308 (2015)