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Shape dependence of emission from microdisk lasers

Formabhängigkeit der Emission von Mikroscheiben-Lasern

Physica status solidi. B 204 (1997), pp.581-583 : Ill., Lit.
ISSN: 0031-8957
ISSN: 0370-1972
Journal Article
Fraunhofer IAF ()
III-V Halbleiter; III-V semiconductor; quantum wells; stimulated emission; stimulierte Emission

The emission characteristics of GaAs Whispering Gallery microdisk lasers have been investigated for different disk shapes and sizes. Elliptical structures showed a substantial increase in the emission intensity from the sides of the disk with the greatest curvature, while stadium-shaped disks did not support any laser emission. Deformation of circular disks towards squares reduces the number of resonant modes for lasing but does not eliminate lasing totally; thus operation with non-Whispering-Gallery modes is possible, and this implies that such operation may be relevant even for circularly symmetrical lasers.