Controllable structuring of exciton-polariton condensates in cylindrical pillar microcavities

V. K. Kalevich, M. M. Afanasiev, V. A. Lukoshkin, D. D. Solnyshkov, G. Malpuech, K. V. Kavokin, S. I. Tsintzos, Z. Hatzopoulos, P. G. Savvidis, and A. V. Kavokin
Phys. Rev. B 91, 045305 – Published 30 January 2015

Abstract

We observe condensation of exciton polaritons in quantum states composed of concentric rings when exciting cylindrical pillar GaAs/AlGaAs microcavities nonresonantly by a focused laser beam normally incident at the center of the pillar. The number of rings depends on the pumping intensity and the pillar size, and may achieve 5 in the pillar of 40μm diameter. Breaking the axial symmetry when moving the excitation spot away from the pillar center leads to transformation of the rings into a number of bright lobes corresponding to quantum states with nonzero angular momenta. The number of lobes, their shape, and location are dependent on the spot position. We describe the out-of-equilibrium condensation of polaritons in the states with different principal quantum numbers and angular momenta with a formalism based on Boltzmann-Gross-Pitaevskii equations accounting for repulsion of polaritons from the exciton reservoir formed at the excitation spot and their spatial confinement by the pillar boundary.

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  • Received 10 November 2014
  • Revised 10 January 2015

DOI:https://doi.org/10.1103/PhysRevB.91.045305

©2015 American Physical Society

Authors & Affiliations

V. K. Kalevich1,2, M. M. Afanasiev1,2, V. A. Lukoshkin1,2, D. D. Solnyshkov3, G. Malpuech3, K. V. Kavokin1,2, S. I. Tsintzos4, Z. Hatzopoulos5, P. G. Savvidis4,6, and A. V. Kavokin1,7

  • 1Spin Optics Laboratory, State University of Saint-Petersburg, 1  Ulianovskaya, 198504 St-Petersburg, Russia
  • 2Ioffe Institute, Russian Academy of Sciences, 26 Politechnicheskaya, 194021 St-Petersburg, Russia
  • 3Insitut Pascal, Photon-N2, Clermont Université, CNRS and University Blaise Pascal, 24 avenue des Landais, 63177 Aubiere cedex, France
  • 4IESL-FORTH, P.O. Box 1527, 71110 Heraklion, Crete, Greece
  • 5Department of Physics, University of Crete, 71003 Heraklion, Crete, Greece
  • 6Department of Materials Science and Technology, University of Crete, 71003 Heraklion, Crete, Greece
  • 7Physics and Astronomy School, University of Southampton, Highfield, Southampton SO171BJ, United Kingdom

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Vol. 91, Iss. 4 — 15 January 2015

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