Ghost branch photoluminescence from a polariton fluid under nonresonant excitation

Maciej Pieczarka; Marcin Syperek; Łukasz Dusanowski; Jan Misiewicz; Fabian Langer; Alfred Forchel; Martin Kamp; Christian Schneider; Sven Höfling; Alexey Kavokin; Grzegorz Sęk

doi:10.1103/PhysRevLett.115.186401

Ghost branch photoluminescence from a polariton fluid under nonresonant excitation

Maciej Pieczarka, Marcin Syperek, Łukasz Dusanowski, Jan Misiewicz, Fabian Langer, Alfred Forchel, Martin Kamp, Christian Schneider, Sven Höfling, Alexey Kavokin, Grzegorz Sęk

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Abstract

An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced increase in the dispersion curvature, with a subsequent linearization of the spectrum and strong luminescence from a ghost branch orthogonally polarized with respect to the linearly polarized condensate emission. Polarization of both branches is understood in terms of spin-dependent polariton-polariton scattering. The presence of the ghost branch has been confirmed in time-resolved measurements. The effects of disorder and dissipation in the photoluminescence of polariton condensates and their excitations are discussed.

Original language	English
Article number	186401
Pages (from-to)	1-5
Number of pages	5
Journal	Physical Review Letters
Volume	115
Issue number	18
DOIs	https://doi.org/10.1103/PhysRevLett.115.186401
Publication status	Published - 26 Oct 2015

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Hoefling_2015_PRL_Ghost_Final_Pub_Version
© 2015 American Physical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at http://dx.doi.org/10.1103/PhysRevLett.115.186401.
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title = "Ghost branch photoluminescence from a polariton fluid under nonresonant excitation",

abstract = "An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced increase in the dispersion curvature, with a subsequent linearization of the spectrum and strong luminescence from a ghost branch orthogonally polarized with respect to the linearly polarized condensate emission. Polarization of both branches is understood in terms of spin-dependent polariton-polariton scattering. The presence of the ghost branch has been confirmed in time-resolved measurements. The effects of disorder and dissipation in the photoluminescence of polariton condensates and their excitations are discussed.",

author = "Maciej Pieczarka and Marcin Syperek and {\L}ukasz Dusanowski and Jan Misiewicz and Fabian Langer and Alfred Forchel and Martin Kamp and Christian Schneider and Sven H{\"o}fling and Alexey Kavokin and Grzegorz S{\c e}k",

note = "The authors acknowledge financial support from the bilateral project of Deutsche Forschungsgemeinschaft (Project LIEPOLATE) and the Polish Ministry of Science and Higher Education (Project No. DPN/N99/DFG/2010). The experiment was partially performed within the NLTK infrastructure, Project No. POIG.02.02.00-003/08-00. A. K. acknowledges financial support from the Russian Ministry of Education and Science (Contract No. 11.G34.31.0067).",

year = "2015",

month = oct,

day = "26",

doi = "10.1103/PhysRevLett.115.186401",

language = "English",

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journal = "Physical Review Letters",

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T1 - Ghost branch photoluminescence from a polariton fluid under nonresonant excitation

AU - Pieczarka, Maciej

AU - Syperek, Marcin

AU - Dusanowski, Łukasz

AU - Misiewicz, Jan

AU - Langer, Fabian

AU - Forchel, Alfred

AU - Kamp, Martin

AU - Schneider, Christian

AU - Höfling, Sven

AU - Kavokin, Alexey

AU - Sęk, Grzegorz

N1 - The authors acknowledge financial support from the bilateral project of Deutsche Forschungsgemeinschaft (Project LIEPOLATE) and the Polish Ministry of Science and Higher Education (Project No. DPN/N99/DFG/2010). The experiment was partially performed within the NLTK infrastructure, Project No. POIG.02.02.00-003/08-00. A. K. acknowledges financial support from the Russian Ministry of Education and Science (Contract No. 11.G34.31.0067).

PY - 2015/10/26

Y1 - 2015/10/26

N2 - An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced increase in the dispersion curvature, with a subsequent linearization of the spectrum and strong luminescence from a ghost branch orthogonally polarized with respect to the linearly polarized condensate emission. Polarization of both branches is understood in terms of spin-dependent polariton-polariton scattering. The presence of the ghost branch has been confirmed in time-resolved measurements. The effects of disorder and dissipation in the photoluminescence of polariton condensates and their excitations are discussed.

AB - An expanding polariton condensate is investigated under pulsed nonresonant excitation with a small laser pump spot. Far above the condensation threshold we observe a pronounced increase in the dispersion curvature, with a subsequent linearization of the spectrum and strong luminescence from a ghost branch orthogonally polarized with respect to the linearly polarized condensate emission. Polarization of both branches is understood in terms of spin-dependent polariton-polariton scattering. The presence of the ghost branch has been confirmed in time-resolved measurements. The effects of disorder and dissipation in the photoluminescence of polariton condensates and their excitations are discussed.

U2 - 10.1103/PhysRevLett.115.186401

DO - 10.1103/PhysRevLett.115.186401

M3 - Article

SN - 0031-9007

VL - 115

SP - 1

EP - 5

JO - Physical Review Letters

JF - Physical Review Letters

IS - 18

M1 - 186401

ER -

Ghost branch photoluminescence from a polariton fluid under nonresonant excitation

Abstract

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