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Circular polariton currents with integer and fractional orbital angular momenta. / Sedov, E. S.; Lukoshkin, V. A.; Kalevich, V. K.; Savvidis, P. G.; Kavokin, A. V.

In: Physical Review Research, Vol. 3, No. 1, 013072, 22.01.2021.

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

Harvard

Sedov, ES, Lukoshkin, VA, Kalevich, VK, Savvidis, PG & Kavokin, AV 2021, 'Circular polariton currents with integer and fractional orbital angular momenta', Physical Review Research, vol. 3, no. 1, 013072. https://doi.org/10.1103/PhysRevResearch.3.013072

APA

Sedov, E. S., Lukoshkin, V. A., Kalevich, V. K., Savvidis, P. G., & Kavokin, A. V. (2021). Circular polariton currents with integer and fractional orbital angular momenta. Physical Review Research, 3(1), [013072]. https://doi.org/10.1103/PhysRevResearch.3.013072

Vancouver

Sedov ES, Lukoshkin VA, Kalevich VK, Savvidis PG, Kavokin AV. Circular polariton currents with integer and fractional orbital angular momenta. Physical Review Research. 2021 Jan 22;3(1). 013072. https://doi.org/10.1103/PhysRevResearch.3.013072

Author

Sedov, E. S. ; Lukoshkin, V. A. ; Kalevich, V. K. ; Savvidis, P. G. ; Kavokin, A. V. / Circular polariton currents with integer and fractional orbital angular momenta. In: Physical Review Research. 2021 ; Vol. 3, No. 1.

BibTeX

@article{31d1bd7fa3d04637a0e6fa67e8a411ed,
title = "Circular polariton currents with integer and fractional orbital angular momenta",
abstract = "We study internal dynamics of exciton-polariton condensates created by the nonresonant optical pump in a cylindrical pillar microcavity with an ensemble of embedded quantum wells. The polariton condensates are intrinsically nonequilibrium systems: Their dissipative nature together with a spatial inhomogeneity of a potential landscape and localized pumping leads to formation of steady polariton flows. The gain-loss engineering consisting of a deliberate breaking of the rotational symmetry of the system makes the polariton flows controllable. We demonstrate the switching between the polariton current states characterized by both integer and fractional orbital angular momenta (OAM) by tuning the position and ellipticity of the pump spot. At a weak shift and a small ellipticity, the phase rather than the density of the exciton-polariton condensate is significantly affected. Then the polariton condensate is characterized by an integer OAM per particle coinciding with the topological charge of the polariton vortex state. We demonstrate experimentally the polariton current states with the topological charges from -3 to +2. The further shift of the pump spot perturbs the azimuthal distribution of the polariton density and causes a jump of the phase of the condensate at the density deep. The mean orbital angular momentum characterizing such polariton condensate acquires fractional values. To describe the experimentally observed polariton current states, we propose a model based on the Gross-Pitaevskii equation projected onto the azimuthal states of the ring trap which treats the formation of fractional OAM states as a result of the coherent superposition of integer OAM states sustained due to the gain-loss balance in the system with a broken rotational symmetry.",
author = "Sedov, {E. S.} and Lukoshkin, {V. A.} and Kalevich, {V. K.} and Savvidis, {P. G.} and Kavokin, {A. V.}",
note = "Publisher Copyright: {\textcopyright} 2021 authors. Published by the American Physical Society.",
year = "2021",
month = jan,
day = "22",
doi = "10.1103/PhysRevResearch.3.013072",
language = "English",
volume = "3",
journal = "Physical Review Research",
issn = "2643-1564",
publisher = "American Physical Society",
number = "1",

}

RIS

TY - JOUR

T1 - Circular polariton currents with integer and fractional orbital angular momenta

AU - Sedov, E. S.

AU - Lukoshkin, V. A.

AU - Kalevich, V. K.

AU - Savvidis, P. G.

AU - Kavokin, A. V.

N1 - Publisher Copyright: © 2021 authors. Published by the American Physical Society.

PY - 2021/1/22

Y1 - 2021/1/22

N2 - We study internal dynamics of exciton-polariton condensates created by the nonresonant optical pump in a cylindrical pillar microcavity with an ensemble of embedded quantum wells. The polariton condensates are intrinsically nonequilibrium systems: Their dissipative nature together with a spatial inhomogeneity of a potential landscape and localized pumping leads to formation of steady polariton flows. The gain-loss engineering consisting of a deliberate breaking of the rotational symmetry of the system makes the polariton flows controllable. We demonstrate the switching between the polariton current states characterized by both integer and fractional orbital angular momenta (OAM) by tuning the position and ellipticity of the pump spot. At a weak shift and a small ellipticity, the phase rather than the density of the exciton-polariton condensate is significantly affected. Then the polariton condensate is characterized by an integer OAM per particle coinciding with the topological charge of the polariton vortex state. We demonstrate experimentally the polariton current states with the topological charges from -3 to +2. The further shift of the pump spot perturbs the azimuthal distribution of the polariton density and causes a jump of the phase of the condensate at the density deep. The mean orbital angular momentum characterizing such polariton condensate acquires fractional values. To describe the experimentally observed polariton current states, we propose a model based on the Gross-Pitaevskii equation projected onto the azimuthal states of the ring trap which treats the formation of fractional OAM states as a result of the coherent superposition of integer OAM states sustained due to the gain-loss balance in the system with a broken rotational symmetry.

AB - We study internal dynamics of exciton-polariton condensates created by the nonresonant optical pump in a cylindrical pillar microcavity with an ensemble of embedded quantum wells. The polariton condensates are intrinsically nonequilibrium systems: Their dissipative nature together with a spatial inhomogeneity of a potential landscape and localized pumping leads to formation of steady polariton flows. The gain-loss engineering consisting of a deliberate breaking of the rotational symmetry of the system makes the polariton flows controllable. We demonstrate the switching between the polariton current states characterized by both integer and fractional orbital angular momenta (OAM) by tuning the position and ellipticity of the pump spot. At a weak shift and a small ellipticity, the phase rather than the density of the exciton-polariton condensate is significantly affected. Then the polariton condensate is characterized by an integer OAM per particle coinciding with the topological charge of the polariton vortex state. We demonstrate experimentally the polariton current states with the topological charges from -3 to +2. The further shift of the pump spot perturbs the azimuthal distribution of the polariton density and causes a jump of the phase of the condensate at the density deep. The mean orbital angular momentum characterizing such polariton condensate acquires fractional values. To describe the experimentally observed polariton current states, we propose a model based on the Gross-Pitaevskii equation projected onto the azimuthal states of the ring trap which treats the formation of fractional OAM states as a result of the coherent superposition of integer OAM states sustained due to the gain-loss balance in the system with a broken rotational symmetry.

UR - http://www.scopus.com/inward/record.url?scp=85101882956&partnerID=8YFLogxK

U2 - 10.1103/PhysRevResearch.3.013072

DO - 10.1103/PhysRevResearch.3.013072

M3 - Article

AN - SCOPUS:85101882956

VL - 3

JO - Physical Review Research

JF - Physical Review Research

SN - 2643-1564

IS - 1

M1 - 013072

ER -

ID: 86432431