Optical probing of the Coulomb interactions of an electrically pumped polariton condensate

M. Klaas; S. Mandal; T. C. H. Liew; M. Amthor; S. Klembt; L Worschech; C. Schneider; Sven Höfling

doi:10.1063/1.4979836

Optical probing of the Coulomb interactions of an electrically pumped polariton condensate

M. Klaas, S. Mandal, T. C. H. Liew, M. Amthor, S. Klembt, L Worschech, C. Schneider, Sven Höfling

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Abstract

We report on optical probing of the Coulomb interactions in an electrically driven exciton-polariton laser. By positioning a weak non-resonant Gaussian continuous wave-beam with a diameter of 2 μm inside an electrical condensate excited in a 20 μm diameter micropillar, we study a repulsion effect which is characteristic of the part-excitonic nature of the microcavity system in strong coupling. It manifests itself in a modified real space distribution of the emission pattern. Furthermore, polariton repulsion results in a continuous blueshift of the emission with increased power of the probe beam. A Gross-Pitaevskii equation approach based on modeling the electrical and optical potentials explains our experimental data.

Original language	English
Article number	151103
Journal	Applied Physics Letters
Volume	110
Issue number	15
DOIs	https://doi.org/10.1063/1.4979836
Publication status	Published - 10 Apr 2017

Keywords

Polaritons
Exciton mediated interactions
Ground states
Blue shift
Condensation

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Hoefling_2017_APL_CoulombInteractions_AAM
© 2017, the Author(s). This work has been made available online in accordance with the publisher’s policies. This is the author created, accepted version manuscript following peer review and may differ slightly from the final published version. The final published version of this work is available at https://dx.doi.org/10.1063/1.4979836
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title = "Optical probing of the Coulomb interactions of an electrically pumped polariton condensate",

abstract = "We report on optical probing of the Coulomb interactions in an electrically driven exciton-polariton laser. By positioning a weak non-resonant Gaussian continuous wave-beam with a diameter of 2 μm inside an electrical condensate excited in a 20 μm diameter micropillar, we study a repulsion effect which is characteristic of the part-excitonic nature of the microcavity system in strong coupling. It manifests itself in a modified real space distribution of the emission pattern. Furthermore, polariton repulsion results in a continuous blueshift of the emission with increased power of the probe beam. A Gross-Pitaevskii equation approach based on modeling the electrical and optical potentials explains our experimental data.",

keywords = "Polaritons, Exciton mediated interactions, Ground states, Blue shift, Condensation",

author = "M. Klaas and S. Mandal and Liew, \{T. C. H.\} and M. Amthor and S. Klembt and L Worschech and C. Schneider and Sven H{\"o}fling",

note = "The authors would like to thank the State of Bavaria for financial support. SM and TL were supported by the NAP Start-Up grant M4081630 and MOE AcRF Tier 1 grant 2016-T1-001-084.",

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doi = "10.1063/1.4979836",

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volume = "110",

journal = "Applied Physics Letters",

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T1 - Optical probing of the Coulomb interactions of an electrically pumped polariton condensate

AU - Klaas, M.

AU - Mandal, S.

AU - Liew, T. C. H.

AU - Amthor, M.

AU - Klembt, S.

AU - Worschech, L

AU - Schneider, C.

AU - Höfling, Sven

N1 - The authors would like to thank the State of Bavaria for financial support. SM and TL were supported by the NAP Start-Up grant M4081630 and MOE AcRF Tier 1 grant 2016-T1-001-084.

PY - 2017/4/10

Y1 - 2017/4/10

N2 - We report on optical probing of the Coulomb interactions in an electrically driven exciton-polariton laser. By positioning a weak non-resonant Gaussian continuous wave-beam with a diameter of 2 μm inside an electrical condensate excited in a 20 μm diameter micropillar, we study a repulsion effect which is characteristic of the part-excitonic nature of the microcavity system in strong coupling. It manifests itself in a modified real space distribution of the emission pattern. Furthermore, polariton repulsion results in a continuous blueshift of the emission with increased power of the probe beam. A Gross-Pitaevskii equation approach based on modeling the electrical and optical potentials explains our experimental data.

AB - We report on optical probing of the Coulomb interactions in an electrically driven exciton-polariton laser. By positioning a weak non-resonant Gaussian continuous wave-beam with a diameter of 2 μm inside an electrical condensate excited in a 20 μm diameter micropillar, we study a repulsion effect which is characteristic of the part-excitonic nature of the microcavity system in strong coupling. It manifests itself in a modified real space distribution of the emission pattern. Furthermore, polariton repulsion results in a continuous blueshift of the emission with increased power of the probe beam. A Gross-Pitaevskii equation approach based on modeling the electrical and optical potentials explains our experimental data.

KW - Polaritons

KW - Exciton mediated interactions

KW - Ground states

KW - Blue shift

KW - Condensation

UR - https://www.scopus.com/pages/publications/85017293267

U2 - 10.1063/1.4979836

DO - 10.1063/1.4979836

M3 - Article

SN - 0003-6951

VL - 110

JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 15

M1 - 151103

ER -

Optical probing of the Coulomb interactions of an electrically pumped polariton condensate

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