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

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 incoheren...

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Autores principales: Pieczarka, Maciej, Syperek, Marcin, Dusanowski, Łukasz, Opala, Andrzej, Langer, Fabian, Schneider, Christian, Höfling, Sven, Sęk, Grzegorz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Nature Publishing Group UK 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5540918/
https://www.ncbi.nlm.nih.gov/pubmed/28769102
http://dx.doi.org/10.1038/s41598-017-07470-8
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author Pieczarka, Maciej
Syperek, Marcin
Dusanowski, Łukasz
Opala, Andrzej
Langer, Fabian
Schneider, Christian
Höfling, Sven
Sęk, Grzegorz
author_facet Pieczarka, Maciej
Syperek, Marcin
Dusanowski, Łukasz
Opala, Andrzej
Langer, Fabian
Schneider, Christian
Höfling, Sven
Sęk, Grzegorz
author_sort Pieczarka, Maciej
collection PubMed
description 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.
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spelling pubmed-55409182017-08-07 Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate Pieczarka, Maciej Syperek, Marcin Dusanowski, Łukasz Opala, Andrzej Langer, Fabian Schneider, Christian Höfling, Sven Sęk, Grzegorz Sci Rep Article 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. Nature Publishing Group UK 2017-08-02 /pmc/articles/PMC5540918/ /pubmed/28769102 http://dx.doi.org/10.1038/s41598-017-07470-8 Text en © 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 http://creativecommons.org/licenses/by/4.0/.
spellingShingle Article
Pieczarka, Maciej
Syperek, Marcin
Dusanowski, Łukasz
Opala, Andrzej
Langer, Fabian
Schneider, Christian
Höfling, Sven
Sęk, Grzegorz
Relaxation Oscillations and Ultrafast Emission Pulses in a Disordered Expanding Polariton Condensate
title 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_short 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
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5540918/
https://www.ncbi.nlm.nih.gov/pubmed/28769102
http://dx.doi.org/10.1038/s41598-017-07470-8
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