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Ring emission and exciton pair scattering in semiconductor microcavities

Ring emission and exciton pair scattering in semiconductor microcavities
Ring emission and exciton pair scattering in semiconductor microcavities
Polariton microemitters are semiconductor devices that take advantage of the strong coupling of light and matter to produce efficient optical sources. Injecting an exciton gas into such a semiconductor microcavity can produce annular optical emission of a specific cone angle. We demonstrate that at higher exciton densities or temperatures, this ring continuously decreases in diameter due to the greater energy that can be carried off in exciton-pair scattering processes. These Coulomb-mediated exciton-exciton scatterings are shown to dominate the polariton relaxation and optical emission.
073309-[4pp]
Savvidis, P.G.
94ddd90f-ba89-4a68-85ca-5581f33105de
Baumberg, J.J.
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Porras, D.
d9d59c2a-2d41-4e73-8901-4c6be4b5c462
Whittaker, D.
ab64b3d4-3b1a-4caf-b0da-02cf4d6f2c63
Skolnick, M.
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Roberts, J.S.
c4eae59e-8356-4436-b317-670038103d16
Savvidis, P.G.
94ddd90f-ba89-4a68-85ca-5581f33105de
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Porras, D.
d9d59c2a-2d41-4e73-8901-4c6be4b5c462
Whittaker, D.
ab64b3d4-3b1a-4caf-b0da-02cf4d6f2c63
Skolnick, M.
7f50869d-5d1e-4a08-887e-4c3f7f1a3770
Roberts, J.S.
c4eae59e-8356-4436-b317-670038103d16

Savvidis, P.G., Baumberg, J.J., Porras, D., Whittaker, D., Skolnick, M. and Roberts, J.S. (2002) Ring emission and exciton pair scattering in semiconductor microcavities. Physical Review B, 65 (73309), 073309-[4pp]. (doi:10.1103/PhysRevB.65.073309).

Record type: Article

Abstract

Polariton microemitters are semiconductor devices that take advantage of the strong coupling of light and matter to produce efficient optical sources. Injecting an exciton gas into such a semiconductor microcavity can produce annular optical emission of a specific cone angle. We demonstrate that at higher exciton densities or temperatures, this ring continuously decreases in diameter due to the greater energy that can be carried off in exciton-pair scattering processes. These Coulomb-mediated exciton-exciton scatterings are shown to dominate the polariton relaxation and optical emission.

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Published date: February 2002
Organisations: Nanoelectronics and Nanotechnology

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Local EPrints ID: 256691
URI: http://eprints.soton.ac.uk/id/eprint/256691
PURE UUID: 5a81b5fd-e20d-4a8f-9ee9-9dec34a3c5d4

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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: J.J. Baumberg
Author: D. Porras
Author: D. Whittaker
Author: M. Skolnick
Author: J.S. Roberts

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