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Proceedings Paper

Plasmonics toward high-efficiency LEDs from the visible to the deep-UV region
Author(s): K. Okamoto; M. Funato; Y. Kawakami; N. Okada; K. Tadatomo; K. Tamada
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Paper Abstract

The surface plasmon (SP) resonance was used to increase the emission efficiencies toward high efficiency light-emitting diodes (LEDs). We obtained the enhancements of the electroluminescence from the fabricated plasmonic LED device structure by employing the very thin p+-GaN layer. The further enhancements should be achievable by optimization of the metal and device structures. Next important challenge is to extend this method from the visible to the deep UV region. By using Aluminum, we obtained the enhancements of emissions at ~260 nm from AlGaN/AlN quantum wells. We succeeded to control the SP resonance by using the various metal nanostructures. These localized SP resonance spectra in the deep-UV regions presented here would be useful to enhance deep UV emissions of super wide bandgap materials such as AlGaN/AlN. We believe that our approaches based on ultra-deep UV plasmonics would bring high efficiency ultra-deep UV light sources.

Paper Details

Date Published: 16 February 2017
PDF: 7 pages
Proc. SPIE 10124, Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI, 101240R (16 February 2017); doi: 10.1117/12.2249589
Show Author Affiliations
K. Okamoto, Kyushu Univ. (Japan)
M. Funato, Kyoto Univ. (Japan)
Y. Kawakami, Kyoto Univ. (Japan)
N. Okada, Yamaguchi Univ. (Japan)
K. Tadatomo, Yamaguchi Univ. (Japan)
K. Tamada, Kyushu Univ. (Japan)

Published in SPIE Proceedings Vol. 10124:
Light-Emitting Diodes: Materials, Devices, and Applications for Solid State Lighting XXI
Jong Kyu Kim; Michael R. Krames; Li-Wei Tu; Martin Strassburg, Editor(s)

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