Interplay between tightly focused excitation and ballistic propagation of polariton condensates in a ZnO microcavity
arXiv:1510.06716 · doi:10.1103/PhysRevB.92.235308
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.
13 pages, 3 tables and 9 figures
References in corpus (9)
- Quantum fluids of light
- Quantised Vortices in an Exciton-Polariton Fluid
- Excitations in a non-equilibrium Bose-Einstein condensate of exciton-polaritons
- Polariton Condensate Transistor Switch
- Spatial and spectral shape of inhomogeneous non-equilibrium exciton-polariton condensates
- Half-solitons in a polariton quantum fluid behave like magnetic monopoles
- Propagation and amplification dynamics of 1D polariton condensates
- Spatial coherence and stability in a disordered organic polariton condensate
- Optical amplifier based on guided polaritons in GaN and ZnO