Investigation of spontaneous emission from quantum dots embedded in two-dimensional photonic-crystal slab
- 8 December 2005
- journal article
- Published by Institution of Engineering and Technology (IET) in Electronics Letters
- Vol. 41 (25) , 1402-1403
- https://doi.org/10.1049/el:20053011
Abstract
Investigated is spontaneous emission (SE) from quantum dots (QDs) embedded within a 2D, photonic crystal (PC) slab, from the viewpoint of redistribution of the excited carriers. SE lifetime was found to increase up to 15-fold, close to theoretically predicted value, by the 2D photonic-bandgap effect and 3D carrier confinement effect of QDs. Emission efficiency in the vertical direction was simultaneously increased 15-fold by excited-carrier redistribution. An artificial point-defect cavity introduced within the PC led to cavity-mode emission at extremely low excitation-power densities −2.Keywords
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