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Off-branch polaritons and multiple scattering in semiconductor microcavities

Off-branch polaritons and multiple scattering in semiconductor microcavities
Off-branch polaritons and multiple scattering in semiconductor microcavities
Angle-resolved measurements show unexpected emission resonances of the polaritons in a semiconductor microcavity. These resonances appear when more than one in-plane polariton mode is macroscopically occupied. The new resonances observed in angle-resolved luminescence do not lie on the expected polariton branches and possess different dispersion relations with negative effective mass. The experimental results can be well explained using an interacting polariton model that treats multiple scattering. The k dispersion of the luminescence resonances is reproduced using the Bogolubov approximation that deals with the macroscopic coherence of the signal, pump, and idler modes. This model also explains many puzzling features such as the stimulation of resonant Rayleigh scattering in the backward direction. In addition, the use of nonresonant control beams for coherent control of the polaritons is shown both experimentally and theoretically. The rich complexity of new phenomena in optically excited semiconductor microcavities can be attributed to the distinctive anti-Hermitian or anomalous coupling between polaritons.
075311
Savvidis, P.G.
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Ciuti, C.
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Baumberg, J.J.
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Whittaker, D.M.
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Skolnick, M.
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Roberts, J.S.
c4eae59e-8356-4436-b317-670038103d16
Savvidis, P.G.
94ddd90f-ba89-4a68-85ca-5581f33105de
Ciuti, C.
c5ec42b0-4024-4dcf-b223-3f38b8626761
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Whittaker, D.M.
c2c77600-df06-4a2a-81a2-628964c9204c
Skolnick, M.
7f50869d-5d1e-4a08-887e-4c3f7f1a3770
Roberts, J.S.
c4eae59e-8356-4436-b317-670038103d16

Savvidis, P.G., Ciuti, C., Baumberg, J.J., Whittaker, D.M., Skolnick, M. and Roberts, J.S. (2001) Off-branch polaritons and multiple scattering in semiconductor microcavities. Physical Review B, 64 (7), 075311. (doi:10.1103/PhysRevB.64.075311).

Record type: Article

Abstract

Angle-resolved measurements show unexpected emission resonances of the polaritons in a semiconductor microcavity. These resonances appear when more than one in-plane polariton mode is macroscopically occupied. The new resonances observed in angle-resolved luminescence do not lie on the expected polariton branches and possess different dispersion relations with negative effective mass. The experimental results can be well explained using an interacting polariton model that treats multiple scattering. The k dispersion of the luminescence resonances is reproduced using the Bogolubov approximation that deals with the macroscopic coherence of the signal, pump, and idler modes. This model also explains many puzzling features such as the stimulation of resonant Rayleigh scattering in the backward direction. In addition, the use of nonresonant control beams for coherent control of the polaritons is shown both experimentally and theoretically. The rich complexity of new phenomena in optically excited semiconductor microcavities can be attributed to the distinctive anti-Hermitian or anomalous coupling between polaritons.

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Published date: July 2001
Organisations: Nanoelectronics and Nanotechnology

Identifiers

Local EPrints ID: 256693
URI: http://eprints.soton.ac.uk/id/eprint/256693
PURE UUID: 1744d630-9baf-4acd-b037-db1d1a93fa5b

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Date deposited: 18 Jul 2002
Last modified: 14 Mar 2024 05:46

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Contributors

Author: P.G. Savvidis
Author: C. Ciuti
Author: J.J. Baumberg
Author: D.M. Whittaker
Author: M. Skolnick
Author: J.S. Roberts

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