Parametric relaxation in whispering gallery mode exciton-polariton condensates

C. P. Dietrich; R. Johne; T. Michalsky; C. Sturm; P. Eastham; H. Franke; M. Lange; M. Grundmann; R. Schmidt-Grund

doi:10.1103/PhysRevB.91.041202

Parametric relaxation in whispering gallery mode exciton-polariton condensates

C. P. Dietrich^*, R. Johne, T. Michalsky, C. Sturm, P. Eastham, H. Franke, M. Lange, M. Grundmann, R. Schmidt-Grund

^*Corresponding author for this work

School of Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

Abstract

Polariton condensation of one-dimensional multimode whispering gallery mode exciton polaritons is investigated in hexagonal ZnO microwires at cryogenic temperatures. At threshold, stimulated scattering is fed by the resonant emission from highly populated defect-bound excitons. With further increasing excitation power, condensates relax within the multimode whispering gallery mode polariton ladder, leading to their effective evaporative cooling. The relaxation is a parametric polariton-polariton scattering process evidenced by its intensity, energy, and momentum evolution. The experimental observations are in good agreement with numerical simulations based on a model for polariton-polariton scattering extended to the multimodal whispering gallery mode system.

Original language	English
Article number	041202
Number of pages	6
Journal	Physical Review. B, Condensed matter and materials physics
Volume	91
Issue number	4
DOIs	https://doi.org/10.1103/PhysRevB.91.041202
Publication status	Published - 16 Jan 2015

Keywords

Semiconductor microcavities
Zinc-oxide
Vortices

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10.1103/PhysRevB.91.041202

Dietrich_2015_PRB_Parametric
© 2015 American Physical Society. Reproduced in accordance with APS Transfer of Copyright terms and conditions.
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title = "Parametric relaxation in whispering gallery mode exciton-polariton condensates",

abstract = "Polariton condensation of one-dimensional multimode whispering gallery mode exciton polaritons is investigated in hexagonal ZnO microwires at cryogenic temperatures. At threshold, stimulated scattering is fed by the resonant emission from highly populated defect-bound excitons. With further increasing excitation power, condensates relax within the multimode whispering gallery mode polariton ladder, leading to their effective evaporative cooling. The relaxation is a parametric polariton-polariton scattering process evidenced by its intensity, energy, and momentum evolution. The experimental observations are in good agreement with numerical simulations based on a model for polariton-polariton scattering extended to the multimodal whispering gallery mode system.",

keywords = "Semiconductor microcavities, Zinc-oxide, Vortices",

author = "Dietrich, {C. P.} and R. Johne and T. Michalsky and C. Sturm and P. Eastham and H. Franke and M. Lange and M. Grundmann and R. Schmidt-Grund",

note = "This work has been supported by Leipzig School of Natural Sciences BuildMoNa (GS 185/1), the European Social Fund (ESF) within Nachwuchsforschergruppe “Multiscale functional structures,” and DFG-FOR1616 (SCHM2710/2-1,P1) “Dynamics and Interactions of Semiconductor Nanowires for Optoelectronics.”",

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doi = "10.1103/PhysRevB.91.041202",

language = "English",

volume = "91",

journal = "Physical Review. B, Condensed matter and materials physics",

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AU - Dietrich, C. P.

AU - Johne, R.

AU - Michalsky, T.

AU - Sturm, C.

AU - Eastham, P.

AU - Franke, H.

AU - Lange, M.

AU - Grundmann, M.

AU - Schmidt-Grund, R.

N1 - This work has been supported by Leipzig School of Natural Sciences BuildMoNa (GS 185/1), the European Social Fund (ESF) within Nachwuchsforschergruppe “Multiscale functional structures,” and DFG-FOR1616 (SCHM2710/2-1,P1) “Dynamics and Interactions of Semiconductor Nanowires for Optoelectronics.”

PY - 2015/1/16

Y1 - 2015/1/16

N2 - Polariton condensation of one-dimensional multimode whispering gallery mode exciton polaritons is investigated in hexagonal ZnO microwires at cryogenic temperatures. At threshold, stimulated scattering is fed by the resonant emission from highly populated defect-bound excitons. With further increasing excitation power, condensates relax within the multimode whispering gallery mode polariton ladder, leading to their effective evaporative cooling. The relaxation is a parametric polariton-polariton scattering process evidenced by its intensity, energy, and momentum evolution. The experimental observations are in good agreement with numerical simulations based on a model for polariton-polariton scattering extended to the multimodal whispering gallery mode system.

AB - Polariton condensation of one-dimensional multimode whispering gallery mode exciton polaritons is investigated in hexagonal ZnO microwires at cryogenic temperatures. At threshold, stimulated scattering is fed by the resonant emission from highly populated defect-bound excitons. With further increasing excitation power, condensates relax within the multimode whispering gallery mode polariton ladder, leading to their effective evaporative cooling. The relaxation is a parametric polariton-polariton scattering process evidenced by its intensity, energy, and momentum evolution. The experimental observations are in good agreement with numerical simulations based on a model for polariton-polariton scattering extended to the multimodal whispering gallery mode system.

KW - Semiconductor microcavities

KW - Zinc-oxide

KW - Vortices

UR - http://journals.aps.org/prb/abstract/10.1103/PhysRevB.91.041202#supplemental

U2 - 10.1103/PhysRevB.91.041202

DO - 10.1103/PhysRevB.91.041202

M3 - Article

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VL - 91

JO - Physical Review. B, Condensed matter and materials physics

JF - Physical Review. B, Condensed matter and materials physics

IS - 4

M1 - 041202

ER -

Parametric relaxation in whispering gallery mode exciton-polariton condensates

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Keywords

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