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Proceedings Paper

Surface plasmon enhanced InGaN light emitter
Author(s): Koichi Okamoto; Isamu Niki; Alexander Shvartser; George Maltezos; Yukio Narukawa; Takashi Mukai; Koji Nishizuka; Yoichi Kawakami; Axel Scherer
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Paper Abstract

We report a dramatic increase in the photoluminescence (PL) emitted from InGaN/GaN quantum wells (QW), obtained by covering these sample surface with thin metallic films. Remarkable enhancements of PL peak intensities were obtained from In0.3Ga0.7N QWs with 50 nm thick silver and aluminum coating with 10 nm GaN spacer. These PL enhancements can be attributed to strong interaction between QWs and surface plasmons (SPs). No such enhancements were obtained from samples coated with gold, as its well-known plasmon resonance occurs only at longer wavelengths. We also showed that QW-SP coupling increase the internal quantum efficiencies by measuring the temperature dependence of PL intensities. QW-SP coupling is a very promising method for developing the super bright light emitting diodes (LEDs). Moreover, we found that the metal nano-structure is very important facto to decide the light extraction. A possible mechanism of QW-SP coupling and emission enhancement has been developed, and high-speed and efficient light emission is predicted for optically as well as electrically pumped light emitters.

Paper Details

Date Published: 13 April 2005
PDF: 10 pages
Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); doi: 10.1117/12.592261
Show Author Affiliations
Koichi Okamoto, California Institute of Technology (United States)
Isamu Niki, California Institute of Technology (United States)
Nichia Corp. (Japan)
Alexander Shvartser, California Institute of Technology (United States)
George Maltezos, California Institute of Technology (United States)
Yukio Narukawa, Nichia Corp. (Japan)
Takashi Mukai, Nichia Corp. (Japan)
Koji Nishizuka, Kyoto Univ. (Japan)
Yoichi Kawakami, Kyoto Univ. (Japan)
Axel Scherer, California Institute of Technology (United States)


Published in SPIE Proceedings Vol. 5733:
Photonic Crystal Materials and Devices III
Ali Adibi; Shawn-Yu Lin; Axel Scherer, Editor(s)

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