Interplay between tightly focused excitation and ballistic propagation of polariton condensates in a ZnO microcavity - Archive ouverte HAL Access content directly
Journal Articles Physical Review B: Condensed Matter and Materials Physics (1998-2015) Year : 2015

Interplay between tightly focused excitation and ballistic propagation of polariton condensates in a ZnO microcavity

Abstract

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.

Dates and versions

hal-01308220 , version 1 (27-04-2016)

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Rereao Hahe, Christelle Brimont, Pierre Valvin, Thierry Guillet, Feng Li, et al.. Interplay between tightly focused excitation and ballistic propagation of polariton condensates in a ZnO microcavity. Physical Review B: Condensed Matter and Materials Physics (1998-2015), 2015, 92, pp.235308. ⟨10.1103/PhysRevB.92.235308⟩. ⟨hal-01308220⟩
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