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Reduced threshold in pierced semiconductor microdisk lasers

Reduced threshold in pierced semiconductor microdisk lasers
Reduced threshold in pierced semiconductor microdisk lasers
GaAs microdisk lasers with holes pierced through the disk surface are investigated for their threshold characteristics. Disks are fabricated with either a single hole or two diametrically opposite holes at various distances from the disk outer edge. Even though the disk area is reduced by only 1%, we find that the lasing threshold for a disk with one hole is reduced by up to 50% compared to a disk with no hole. We attribute this reduction to the perturbation of nonlasing modes, which decreases the amplification of spontaneous emission in these modes and makes more carriers available to contribute to lasing.
0003-6951
176-178
Backes, S.
23e44d62-4a00-4e5f-b1de-e736b6375247
Cleaver, J.R.A.
19303891-8463-4930-a5b7-bf04ca5a471c
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Heberle, A.P.
0fd8af77-7331-4828-a442-707db2667588
Backes, S.
23e44d62-4a00-4e5f-b1de-e736b6375247
Cleaver, J.R.A.
19303891-8463-4930-a5b7-bf04ca5a471c
Baumberg, J.J.
78e1ea7e-8c70-404c-bf84-59aafe75cd07
Heberle, A.P.
0fd8af77-7331-4828-a442-707db2667588

Backes, S., Cleaver, J.R.A., Baumberg, J.J. and Heberle, A.P. (1999) Reduced threshold in pierced semiconductor microdisk lasers. Applied Physics Letters, 74 (2), 176-178. (doi:10.1063/1.123285).

Record type: Article

Abstract

GaAs microdisk lasers with holes pierced through the disk surface are investigated for their threshold characteristics. Disks are fabricated with either a single hole or two diametrically opposite holes at various distances from the disk outer edge. Even though the disk area is reduced by only 1%, we find that the lasing threshold for a disk with one hole is reduced by up to 50% compared to a disk with no hole. We attribute this reduction to the perturbation of nonlasing modes, which decreases the amplification of spontaneous emission in these modes and makes more carriers available to contribute to lasing.

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More information

Published date: 1999
Organisations: Electronics & Computer Science

Identifiers

Local EPrints ID: 252657
URI: http://eprints.soton.ac.uk/id/eprint/252657
ISSN: 0003-6951
PURE UUID: 301a009d-2922-49fa-93ec-d4d8cb6f498f

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Date deposited: 10 Mar 2000
Last modified: 29 Jan 2020 15:13

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