Journal
APPLIED PHYSICS LETTERS
Volume 89, Issue 18, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.2372448
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The authors have demonstrated photopumped laser action of self-assembled ring-shaped GaAs quantum dots (QDs) grown by droplet epitaxy. Morphological control of the QD shape from conelike dots to ringlike ones results in a narrow spectral band of photoluminescence from the QD ensemble, reflecting their small size distribution. Using ring-shaped QDs as an active laser medium, they observed multimodal stimulated emissions from the ground state at temperatures of up to 300 K. (c) 2006 American Institute of Physics.
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