Polariton Dynamics and Bose-Einstein Condensation in semiconductor microcavities
Polariton Dynamics and Bose-Einstein Condensation in semiconductor microcavities
We present a theoretical model that allows us to describe the polariton dynamics in a semiconductor microcavity at large densities, for the case of nonresonant excitation. Exciton-polariton scattering from a thermalized exciton reservoir is identified as the main mechanism for relaxation into the lower polariton states. A maximum in the polariton distribution that shifts towards lower energies with increasing pump power or temperature is shown, in agreement with recent experiments. Above a critical pump power, macroscopic occupancies (5x10(4)) can be achieved in the lowest-energy polariton state. Our model predicts the possibility of Bose-Einstein condensation of polaritons, driven by exciton-polariton interaction, at densities well below the saturation density for CdTe microcavities.
stimulated scattering, photoluminescence, exciton, relaxation, luminescence, bottleneck, amplifier
085304-[11pp]
Porras, D
0b22f058-8148-48fb-8a21-dd3f44160869
Ciuti, C
a3c44130-9481-44e8-a5cf-e765b5c0dccd
Baumberg, J J
3eed479f-7e4f-4290-b814-1e703458c507
Tejedor, C
832dbad4-0dda-44ba-971e-21e815872bdb
2002
Porras, D
0b22f058-8148-48fb-8a21-dd3f44160869
Ciuti, C
a3c44130-9481-44e8-a5cf-e765b5c0dccd
Baumberg, J J
3eed479f-7e4f-4290-b814-1e703458c507
Tejedor, C
832dbad4-0dda-44ba-971e-21e815872bdb
Porras, D, Ciuti, C, Baumberg, J J and Tejedor, C
(2002)
Polariton Dynamics and Bose-Einstein Condensation in semiconductor microcavities.
Physical Review B, 66 (85304), .
(doi:10.1103/PhysRevB.66.085304).
Abstract
We present a theoretical model that allows us to describe the polariton dynamics in a semiconductor microcavity at large densities, for the case of nonresonant excitation. Exciton-polariton scattering from a thermalized exciton reservoir is identified as the main mechanism for relaxation into the lower polariton states. A maximum in the polariton distribution that shifts towards lower energies with increasing pump power or temperature is shown, in agreement with recent experiments. Above a critical pump power, macroscopic occupancies (5x10(4)) can be achieved in the lowest-energy polariton state. Our model predicts the possibility of Bose-Einstein condensation of polaritons, driven by exciton-polariton interaction, at densities well below the saturation density for CdTe microcavities.
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Published date: 2002
Keywords:
stimulated scattering, photoluminescence, exciton, relaxation, luminescence, bottleneck, amplifier
Organisations:
Nanoelectronics and Nanotechnology
Identifiers
Local EPrints ID: 257622
URI: http://eprints.soton.ac.uk/id/eprint/257622
ISSN: 1550-235X
PURE UUID: b2203ca0-4f27-4b30-a559-a07112e68e57
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Date deposited: 17 Jun 2003
Last modified: 14 Mar 2024 05:59
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Author:
D Porras
Author:
C Ciuti
Author:
J J Baumberg
Author:
C Tejedor
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