We demonstrate uni-directional emission near 400 nm from lasing InGaN/InGaN multiple quantum-well (MQW) spiral micropillars. Reduction of the lasing threshold (to current densities as low as 4.6 kA/cm/sup 2/ when current-injected) and enhancement of uni-directionality occurs when the microcavity is selectively optically or electrically pumped near its boundary.
Uni-directionally blue emitting spiral-shaped micropillar laser diode
2004-01-01
157258 byte
Aufsatz (Konferenz)
Elektronische Ressource
Englisch
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