%0 Journal Article
%T Interplay between tightly focused excitation and ballistic propagation of polariton condensates in a ZnO microcavity
%+ Laboratoire Charles Coulomb (L2C)
%+ Centre de recherche sur l'hétéroepitaxie et ses applications (CRHEA)
%+ Laboratoire de photonique et de nanostructures (LPN)
%A Hahe, Rereao
%A Brimont, Christelle
%A Valvin, Pierre
%A Guillet, Thierry
%A Li, Feng
%A Leroux, Mathieu
%A Zuniga-Perez, Jesus
%A Lafosse, Xavier
%A Patriarche, Gilles
%A Bouchoule, Sophie
%Z 13 pages, 3 tables and 9 figures. Réf Journal: Phys. Rev. B 92, 235308 (2015)
%< avec comité de lecture
%Z L2C:15-280
%@ 1098-0121
%J Physical Review B: Condensed Matter and Materials Physics (1998-2015)
%I American Physical Society
%V 92
%P 235308
%8 2015-12-23
%D 2015
%Z 1510.06716
%R 10.1103/PhysRevB.92.235308
%Z Physics [physics]/Condensed Matter [cond-mat]/Mesoscopic Systems and Quantum Hall Effect [cond-mat.mes-hall]Journal articles
%X 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.
%G English
%L hal-01308220
%U https://hal.science/hal-01308220
%~ UNICE
%~ CNRS
%~ L2C
%~ MIPS
%~ UNIV-MONTPELLIER
%~ UNIV-COTEDAZUR
%~ CRHEA
%~ UM-2015-2021