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

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45 Scopus citations

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
Journal	Physical Review B
Volume	93
Issue number	12
DOIs	https://doi.org/10.1103/PhysRevB.93.121303
State	Published - 10 Mar 2016
Externally published	Yes

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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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doi = "10.1103/PhysRevB.93.121303",

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T1 - Collective state transitions of exciton-polaritons loaded into a periodic potential

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.

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

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