Journal
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA B-OPTICAL PHYSICS
Volume 25, Issue 8, Pages 1328-1335Publisher
OPTICAL SOC AMER
DOI: 10.1364/JOSAB.25.001328
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Funding
- Department of Energy [DE-FG02-06ER46332]
- U.S. Department of Energy (DOE) [DE-FG02-06ER46332] Funding Source: U.S. Department of Energy (DOE)
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The coupling between excited electron-hole pairs in semiconductor active layers and surface plasmon polaritons in metallo-dielectric stacks is investigated. These structures can be used to engineer the surface-plasmon dispersion properties so as to introduce tunable singularities in the photonic density of modes, and hence in the recombination rate of nearby active media. A detailed theoretical study of this effect is presented together with the experimental demonstration of geometrically tunable increased recombination in GaN/AlGaN quantum wells via near-UV photoluminescence measurements. If combined with a suitable geometry to efficiently scatter the emitted surface waves into radiation, this approach can be used for light-emission efficiency enhancement at tunable wavelengths. (C) 2008 Optical Society of America
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