Reduced threshold in pierced semiconductor microdisk lasers


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

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Description/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.

Item Type: Article
Related URLs:
Subjects: Q Science > QC Physics
Divisions: University Structure - Pre August 2011 > School of Physics and Astronomy
ePrint ID: 14666
Date Deposited: 23 Feb 2005
Last Modified: 27 Mar 2014 18:05
URI: http://eprints.soton.ac.uk/id/eprint/14666

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