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Polariton-polariton Interactions and Stimulated Emission in Semiconductor Microcavities

Polariton-polariton Interactions and Stimulated Emission in Semiconductor Microcavities
Polariton-polariton Interactions and Stimulated Emission in Semiconductor Microcavities
Recent work on polariton-polariton scattering in semiconductor microcavities under continuous wave excitation conditions is reviewed. For weak non-resonant laser excitation, a marked bottleneck in the polariton distribution is observed, but which is suppressed by polariton-polariton scattering as the laser intensity is increased. However, the high excitation conditions necessary to observe stimulated emission lead to loss of strong coupling and conventional lasing in the weak coupling regime, By contrast for resonant excitation, polaritons are created directly in the polariton trap formed by the microcavity dispersion curve. Stimulated scattering of the bosonic quasi-particles occurs to the emitting state at the centre of the Brillouin zone, and to a companion state at high wavevector. The stimulation phenomena lead to condensation of the bosonic quasi-particles to two specific regions of k-space, and to the formation of a new state with macroscopic coherence. The prospects to achieve a polariton laser under conditions of non-resonant excitation are discussed.
Microcavities, Exciton–polaritons, Bosonic stimulation, Final state stimulation
0928-4931
407-416
Skolnick, M S
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Stevenson, R M
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Tartakovskii, A I
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Butte, R
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Emam-Ismail, M E
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Whittaker, D M
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Savvidis, P G
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Baumberg, J J
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Lemaitre, A
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Astrotov, V N
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Roberts, J S
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Skolnick, M S
b5606a9d-e76b-4db8-bda9-fb0cf95f7a2e
Stevenson, R M
b5820958-4fe4-4159-974b-1352ce275039
Tartakovskii, A I
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Butte, R
db31c31e-5dce-409d-9690-573871295a6f
Emam-Ismail, M E
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Whittaker, D M
4dbc44b8-60a1-44b0-b025-32071530b8ac
Savvidis, P G
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Baumberg, J J
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Lemaitre, A
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Astrotov, V N
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Roberts, J S
fffb7453-973f-445d-a846-bdf804824108

Skolnick, M S, Stevenson, R M, Tartakovskii, A I, Butte, R, Emam-Ismail, M E, Whittaker, D M, Savvidis, P G, Baumberg, J J, Lemaitre, A, Astrotov, V N and Roberts, J S (2002) Polariton-polariton Interactions and Stimulated Emission in Semiconductor Microcavities. Materials Science and Engineering: C, 19 (1-2), 407-416. (doi:10.1016/S0928-4931(01)00433-7).

Record type: Article

Abstract

Recent work on polariton-polariton scattering in semiconductor microcavities under continuous wave excitation conditions is reviewed. For weak non-resonant laser excitation, a marked bottleneck in the polariton distribution is observed, but which is suppressed by polariton-polariton scattering as the laser intensity is increased. However, the high excitation conditions necessary to observe stimulated emission lead to loss of strong coupling and conventional lasing in the weak coupling regime, By contrast for resonant excitation, polaritons are created directly in the polariton trap formed by the microcavity dispersion curve. Stimulated scattering of the bosonic quasi-particles occurs to the emitting state at the centre of the Brillouin zone, and to a companion state at high wavevector. The stimulation phenomena lead to condensation of the bosonic quasi-particles to two specific regions of k-space, and to the formation of a new state with macroscopic coherence. The prospects to achieve a polariton laser under conditions of non-resonant excitation are discussed.

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Published date: 2002
Keywords: Microcavities, Exciton–polaritons, Bosonic stimulation, Final state stimulation
Organisations: Nanoelectronics and Nanotechnology

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Local EPrints ID: 257634
URI: http://eprints.soton.ac.uk/id/eprint/257634
ISSN: 0928-4931
PURE UUID: c5213b3f-e373-40f8-aaa9-8ea61a8399c6

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Date deposited: 17 Jun 2003
Last modified: 14 Mar 2024 05:59

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Contributors

Author: M S Skolnick
Author: R M Stevenson
Author: A I Tartakovskii
Author: R Butte
Author: M E Emam-Ismail
Author: D M Whittaker
Author: P G Savvidis
Author: J J Baumberg
Author: A Lemaitre
Author: V N Astrotov
Author: J S Roberts

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