Collective state transitions of exciton-polaritons loaded into a periodic potential

K. Winkler; O. A. Egorov; I. G. Savenko; X. Ma; E. Estrecho; T. Gao; S. Müller; M. Kamp; T. C. H. Liew; E. A. Ostrovskaya; S. Höfling; C. Schneider

doi:10.1103/PhysRevB.93.121303

Collective state transitions of exciton-polaritons loaded into a periodic potential

K. Winkler^*
, O. A. Egorov
, I. G. Savenko
, X. Ma
, E. Estrecho
, T. Gao
, S. Müller
, M. Kamp
, T. C. H. Liew
, E. A. Ostrovskaya
, S. Höfling
, C. Schneider

^*Corresponding author for this work

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

49 Citations (Scopus)

Abstract

We study the loading of a nonequilibrium, dissipative system of composite bosons-exciton polaritons-into a one-dimensional periodic lattice potential. Utilizing momentum resolved photoluminescence spectroscopy, we observe a transition between an incoherent Bose gas and a polariton condensate, which undergoes further transitions between different energy states in the band-gap spectrum of the periodic potential with increasing pumping power. We demonstrate controlled loading into distinct energy bands by modifying the size and shape of the excitation beam. The observed effects are comprehensively described in the framework of a nonequilibrium model of polariton condensation. In particular, we implement a stochastic treatment of quantum and thermal fluctuations in the system and conclude that polariton-phonon scattering is a plausible energy relaxation mechanism enabling transitions from the highly nonequilibrium polariton condensate in the gap to the ground band condensation for large pump powers.

Original language	English
Article number	121303
Number of pages	6
Journal	Physical Review B
Volume	93
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.93.121303
Publication status	Published - 10 Mar 2016
MoE publication type	A1 Journal article-refereed

Funding

O.A.E. acknowledges financial support by the Deutsche Forschungsgemeinschaft (DFG project EG344/2-1) and by the EU project (FP7, PIRSES-GA-2013-612600) LIMACONA. I.G.S. acknowledges support from the Academy of Finland through its Centre of Excellence Programs (Projects No. 250280 and No. 251748); Government of Russian Federation (project MK-5903.2016.2); and Dynasty Foundation. The calculations presented here were partly performed using supercomputer facilities within the Aalto University School of Science Science-IT project. E.E., T.G., I.G.S., and E.A.O. acknowledge support by the Australian Research Council, discussions with Michael Fraser, and assistance of Robert Dall with the experimental setup. The Wurzburg group acknowledges financial support from the state of Bavaria. Assistance of Anne Schade, Jonas Gessler, and Monika Emmerling during fabrication and patterning of the sample is gratefully acknowledged.

Keywords

BOSE-EINSTEIN CONDENSATION
MICROCAVITY POLARITONS
BOTTLENECK
RELAXATION

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10.1103/PhysRevB.93.121303

http://hdl.handle.net/1885/152921

Cite this

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title = "Collective state transitions of exciton-polaritons loaded into a periodic potential",

abstract = "We study the loading of a nonequilibrium, dissipative system of composite bosons-exciton polaritons-into a one-dimensional periodic lattice potential. Utilizing momentum resolved photoluminescence spectroscopy, we observe a transition between an incoherent Bose gas and a polariton condensate, which undergoes further transitions between different energy states in the band-gap spectrum of the periodic potential with increasing pumping power. We demonstrate controlled loading into distinct energy bands by modifying the size and shape of the excitation beam. The observed effects are comprehensively described in the framework of a nonequilibrium model of polariton condensation. In particular, we implement a stochastic treatment of quantum and thermal fluctuations in the system and conclude that polariton-phonon scattering is a plausible energy relaxation mechanism enabling transitions from the highly nonequilibrium polariton condensate in the gap to the ground band condensation for large pump powers.",

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month = mar,

day = "10",

doi = "10.1103/PhysRevB.93.121303",

language = "English",

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AU - Winkler, K.

AU - Egorov, O. A.

AU - Savenko, I. G.

AU - Ma, X.

AU - Estrecho, E.

AU - Gao, T.

AU - Müller, S.

AU - Kamp, M.

AU - Liew, T. C. H.

AU - Ostrovskaya, E. A.

AU - Höfling, S.

AU - Schneider, C.

PY - 2016/3/10

Y1 - 2016/3/10

N2 - We study the loading of a nonequilibrium, dissipative system of composite bosons-exciton polaritons-into a one-dimensional periodic lattice potential. Utilizing momentum resolved photoluminescence spectroscopy, we observe a transition between an incoherent Bose gas and a polariton condensate, which undergoes further transitions between different energy states in the band-gap spectrum of the periodic potential with increasing pumping power. We demonstrate controlled loading into distinct energy bands by modifying the size and shape of the excitation beam. The observed effects are comprehensively described in the framework of a nonequilibrium model of polariton condensation. In particular, we implement a stochastic treatment of quantum and thermal fluctuations in the system and conclude that polariton-phonon scattering is a plausible energy relaxation mechanism enabling transitions from the highly nonequilibrium polariton condensate in the gap to the ground band condensation for large pump powers.

AB - We study the loading of a nonequilibrium, dissipative system of composite bosons-exciton polaritons-into a one-dimensional periodic lattice potential. Utilizing momentum resolved photoluminescence spectroscopy, we observe a transition between an incoherent Bose gas and a polariton condensate, which undergoes further transitions between different energy states in the band-gap spectrum of the periodic potential with increasing pumping power. We demonstrate controlled loading into distinct energy bands by modifying the size and shape of the excitation beam. The observed effects are comprehensively described in the framework of a nonequilibrium model of polariton condensation. In particular, we implement a stochastic treatment of quantum and thermal fluctuations in the system and conclude that polariton-phonon scattering is a plausible energy relaxation mechanism enabling transitions from the highly nonequilibrium polariton condensate in the gap to the ground band condensation for large pump powers.

KW - BOSE-EINSTEIN CONDENSATION

KW - MICROCAVITY POLARITONS

KW - BOTTLENECK

KW - RELAXATION

U2 - 10.1103/PhysRevB.93.121303

DO - 10.1103/PhysRevB.93.121303

M3 - Article

SN - 2469-9950

VL - 93

JO - Physical Review B

JF - Physical Review B

IS - 12

M1 - 121303

ER -

Collective state transitions of exciton-polaritons loaded into a periodic potential

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