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Title
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Unstable and stable regimes of polariton condensation
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Author
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Abstract
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| Modulational instabilities play a key role in a wide range of nonlinear optical phenomena, leading, e.g., to the formation of spatial and temporal solitons, rogue waves, and chaotic dynamics. Here, we experimentally demonstrate the existence of a modulational instability in condensates of cavity polaritons, quasi-particles arising from the strong coupling of cavity photons with quantum well excitons. For this purpose, we investigate the spatiotemporal coherence properties of polariton condensates in GaAs-based microcavities under continuous-wave pumping. The chaotic behavior of the instability results in a strongly reduced spatial and temporal coherence and a significantly inhomogeneous density. Additionally, we show how the instability can be tamed by introducing a periodic potential so that condensation occurs in negative mass states, leading to largely improved coherence and homogeneity. These results pave the way to the exploration of long-range order in dissipative quantum fluids of light within a controlled platform. Published by The Optical Society under the terms of the Creative Commons Attribution 4.0 License. |
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Language
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English
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Source (journal)
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Optica
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Publication
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Optical Society of America (OSA)
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2018
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ISSN
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2334-2536
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Volume/pages
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5
:10
(2018)
, p. 1163-1170
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ISI
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000447853100001
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Full text (Publisher's DOI)
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Full text (open access)
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