Ground-state polariton condensation in 2D-GaAs semiconductor microcavities

We observe ground-state polariton condensation in a two dimensional GaAs/AlAs semiconductor microcavity under non resonant pulsed optical excitation. We resolve the formation of a polariton condensate by studying the spatial, angular, coherence, energy and transient dynamics of polariton photolumine...

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Bibliographic Details
Published in:arXiv.org 2009-07
Main Authors: Maragkou, M, Grundy, A J D, Lagoudakis, P G
Format: Article
Language:English
Subjects:
Condensation
Excitation
Microcavities
Photoluminescence
Polaritons
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Summary:We observe ground-state polariton condensation in a two dimensional GaAs/AlAs semiconductor microcavity under non resonant pulsed optical excitation. We resolve the formation of a polariton condensate by studying the spatial, angular, coherence, energy and transient dynamics of polariton photoluminescence. For high excitation densities we also observe a transition from the weak- to the strong-coupling regime in the time-domain and resolve the build-up of a coherent polariton state.
ISSN:2331-8422