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Enhanced Light Emission by Exciton-Surface Plasmon Coupling

Published online by Cambridge University Press:  01 February 2011

Koichi Okamoto
Affiliation:, Kyoto University, Electronic Science and Engineerin, Katsura Campus, Nishikyo-ku, kyoto, 615-8510, Japan, +81-75-383-2314, +81-75-383-2312
Axel Scherer
Affiliation:, California Institute of Technology, Department of Physics, 1200 E. California Blvd., Pasadena, CA, 91125, United States
Yoichi kawakami
Affiliation:, Kyoto University, Department of Electronic Science and Engineering, Katsura Campus, Nishikyo-ku, Kyoto, 615-8510, Japan
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Surface plasmon coupling technique was performed to enhanced green light emissions from InGaN/GaN quantum well. We found that photoluminescence intensities were increased by fabricated nano-grating structures on the gold layers and enhancement ratios depend on the grating periods. We also simulated the localized SP modes by 3D-finite difference time domain (FDTD) calculation. The experimental results were well correlated to the calculated results, and we found that the both exciton-SP coupling and light extraction process can be controlled by the nano-structures of the interfaces. This suggests that even more efficient emission should be obtainable by optimizing the nanostructure geometries.

Research Article
Copyright © Materials Research Society 2008

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