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dc.contributor.authorPieczarka, Maciej
dc.contributor.authorSyperek, Marcin
dc.contributor.authorDusanowski, Łukasz
dc.contributor.authorOpala, Andrzej
dc.contributor.authorLanger, Fabian
dc.contributor.authorSchneider, Christian
dc.contributor.authorHöfling, Sven
dc.contributor.authorSȩk, Grzegorz
dc.identifier.citationPieczarka , M , Syperek , M , Dusanowski , Ł , Opala , A , Langer , F , Schneider , C , Höfling , S & Sȩk , G 2017 , ' Relaxation oscillations and ultrafast emission pulses in a disordered expanding polariton condensate ' Scientific Reports , vol. 7 , no. 1 , 7470 .
dc.identifier.otherPURE: 250754890
dc.identifier.otherPURE UUID: 9652c364-850b-43ad-b301-c06350362b97
dc.identifier.otherScopus: 85026821396
dc.description.abstractSemiconductor microcavities are often influenced by structural imperfections, which can disturb the flow and dynamics of exciton-polariton condensates. Additionally, in exciton-polariton condensates there is a variety of dynamical scenarios and instabilities, owing to the properties of the incoherent excitonic reservoir. We investigate the dynamics of an exciton-polariton condensate which emerges in semiconductor microcavity subject to disorder, which determines its spatial and temporal behaviour. Our experimental data revealed complex burst-like time evolution under non-resonant optical pulsed excitation. The temporal patterns of the condensate emission result from the intrinsic disorder and are driven by properties of the excitonic reservoir, which decay in time much slower with respect to the polariton condensate lifetime. This feature entails a relaxation oscillation in polariton condensate formation, resulting in ultrafast emission pulses of coherent polariton field. The experimental data can be well reproduced by numerical simulations, where the condensate is coupled to the excitonic reservoir described by a set of rate equations. Theory suggests the existence of slow reservoir temporarily emptied by stimulated scattering to the condensate, generating ultrashort pulses of the condensate emission.
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dc.rights© The Author(s) 2017. Open Access. This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons license and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this license, visit
dc.subjectQC Physicsen
dc.titleRelaxation oscillations and ultrafast emission pulses in a disordered expanding polariton condensateen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews.School of Physics and Astronomyen
dc.contributor.institutionUniversity of St Andrews.Condensed Matter Physicsen
dc.description.statusPeer revieweden

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