Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate

Abstract Semiconductor 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...

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Autores principales:	Maciej Pieczarka, Marcin Syperek, Łukasz Dusanowski, Andrzej Opala, Fabian Langer, Christian Schneider, Sven Höfling, Grzegorz Sęk
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/49c80974dec34ccd88176333adfdad85
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spelling	oai:doaj.org-article:49c80974dec34ccd88176333adfdad852021-12-02T11:52:42ZRelaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate10.1038/s41598-017-07470-82045-2322https://doaj.org/article/49c80974dec34ccd88176333adfdad852017-08-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-07470-8https://doaj.org/toc/2045-2322Abstract Semiconductor 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.Maciej PieczarkaMarcin SyperekŁukasz DusanowskiAndrzej OpalaFabian LangerChristian SchneiderSven HöflingGrzegorz SękNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-8 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Maciej Pieczarka Marcin Syperek Łukasz Dusanowski Andrzej Opala Fabian Langer Christian Schneider Sven Höfling Grzegorz Sęk Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
description	Abstract Semiconductor 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.
format	article
author	Maciej Pieczarka Marcin Syperek Łukasz Dusanowski Andrzej Opala Fabian Langer Christian Schneider Sven Höfling Grzegorz Sęk
author_facet	Maciej Pieczarka Marcin Syperek Łukasz Dusanowski Andrzej Opala Fabian Langer Christian Schneider Sven Höfling Grzegorz Sęk
author_sort	Maciej Pieczarka
title	Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
title_short	Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
title_full	Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
title_fullStr	Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
title_full_unstemmed	Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
title_sort	relaxation oscillations and ultrafast emission pulses in a disordered expanding polariton condensate
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/49c80974dec34ccd88176333adfdad85
work_keys_str_mv	AT maciejpieczarka relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT marcinsyperek relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT łukaszdusanowski relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT andrzejopala relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT fabianlanger relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT christianschneider relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT svenhofling relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate AT grzegorzsek relaxationoscillationsandultrafastemissionpulsesinadisorderedexpandingpolaritoncondensate
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Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate

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