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Room-temperature polariton lasing in semiconductor microcavities

Room-temperature polariton lasing in semiconductor microcavities
Room-temperature polariton lasing in semiconductor microcavities
We observe a room-temperature low-threshold transition to a coherent polariton state in bulk GaN microcavities in the strong-coupling regime. Nonresonant pulsed optical pumping produces rapid thermalization and yields a clear emission threshold of 1 mW, corresponding to an absorbed energy density of 29 µJ cm-2, 1 order of magnitude smaller than the best optically pumped (In,Ga)N quantum well surface-emitting lasers (VCSELs). Angular and spectrally resolved luminescence show that the polariton emission is beamed in the normal direction with an angular width of ± 5deg and spatial size around 5 µm.
0031-9007
126405-[4pp]
Christopoulos, S.
29bc537f-3048-4499-a09c-f61af565dd77
Baldassarri Höger von Högersthal, G.
f1ce8c31-5b94-42b9-aae6-a90031110954
Grundy, A.J.D.
a212073e-e7f1-4708-82cb-79b2ce3bb41b
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Christmann, G.
f33516d7-4986-49db-bf0a-87af05eea29b
Butté, R.
77f41e56-4324-4494-b332-40c3a2e4872f
Feltin, E.
a3d107e3-0e84-4a55-8be9-d978db6dba0b
Carlin, J.-F.
276cb59f-fde5-4e0e-a03b-57310e64173d
Grandjean, N.
625e8c89-a217-418c-a358-f53b123770ef
Christopoulos, S.
29bc537f-3048-4499-a09c-f61af565dd77
Baldassarri Höger von Högersthal, G.
f1ce8c31-5b94-42b9-aae6-a90031110954
Grundy, A.J.D.
a212073e-e7f1-4708-82cb-79b2ce3bb41b
Lagoudakis, P.G.
ea50c228-f006-4edf-8459-60015d961bbf
Kavokin, A.V.
70ffda66-cfab-4365-b2db-c15e4fa1116b
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Christmann, G.
f33516d7-4986-49db-bf0a-87af05eea29b
Butté, R.
77f41e56-4324-4494-b332-40c3a2e4872f
Feltin, E.
a3d107e3-0e84-4a55-8be9-d978db6dba0b
Carlin, J.-F.
276cb59f-fde5-4e0e-a03b-57310e64173d
Grandjean, N.
625e8c89-a217-418c-a358-f53b123770ef

Christopoulos, S., Baldassarri Höger von Högersthal, G., Grundy, A.J.D., Lagoudakis, P.G., Kavokin, A.V., Baumberg, J.J., Christmann, G., Butté, R., Feltin, E., Carlin, J.-F. and Grandjean, N. (2007) Room-temperature polariton lasing in semiconductor microcavities. Physical Review Letters, 98 (12), 126405-[4pp]. (doi:10.1103/PhysRevLett.98.126405).

Record type: Article

Abstract

We observe a room-temperature low-threshold transition to a coherent polariton state in bulk GaN microcavities in the strong-coupling regime. Nonresonant pulsed optical pumping produces rapid thermalization and yields a clear emission threshold of 1 mW, corresponding to an absorbed energy density of 29 µJ cm-2, 1 order of magnitude smaller than the best optically pumped (In,Ga)N quantum well surface-emitting lasers (VCSELs). Angular and spectrally resolved luminescence show that the polariton emission is beamed in the normal direction with an angular width of ± 5deg and spatial size around 5 µm.

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More information

Published date: 21 March 2007

Identifiers

Local EPrints ID: 46185
URI: http://eprints.soton.ac.uk/id/eprint/46185
ISSN: 0031-9007
PURE UUID: 1c1c25b3-cefd-4d4b-94c5-d5dac24d71b8

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Date deposited: 29 May 2007
Last modified: 13 Mar 2019 21:03

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