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Surface plasmon enhanced InGaN light emitter

Okamoto, Koichi and Niki, Isamu and Shvartser, Alexander and Maltezos, George and Narukawa, Yukio and Mukai, Takashi and Nishizuka, Koji and Kawakami, Yoichi and Scherer, Axel (2005) Surface plasmon enhanced InGaN light emitter. In: Photonic Crystal Materials and Devices III. Proceedings of SPIE. No.5733. Society of Photo-optical Instrumentation Engineers (SPIE) , Bellingham, WA, pp. 94-103. ISBN 0819457078.

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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 In_(0.3)Ga_(0.7)N 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.

Item Type:Book Section
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Additional Information:© 2005 Society of Photo-Optical Instrumentation Engineers (SPIE).
Subject Keywords:surface plasmon, InGaN/GaN, light emitting diode, quantum well, internal quantum efficiency, solid-state light source
Series Name:Proceedings of SPIE
Issue or Number:5733
Record Number:CaltechAUTHORS:20180710-092732755
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Official Citation:Koichi Okamoto, Isamu Niki, Alexander Shvartser, George Maltezos, Yukio Narukawa, Takashi Mukai, Koji Nishizuka, Yoichi Kawakami, Axel Scherer, "Surface plasmon enhanced InGaN light emitter", Proc. SPIE 5733, Photonic Crystal Materials and Devices III, (13 April 2005); doi: 10.1117/12.592261;
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:87686
Deposited By: George Porter
Deposited On:10 Jul 2018 17:00
Last Modified:03 Oct 2019 19:58

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