Enhancement of light emission and internal quantum efficiency in orange and red regions for regularly arrayed InGaN/GaN nanocolumns due to surface plasmon coupling

被引：9
|
作者：
Oto, Takao [1 ]
Kikuchi, Kazuma [1 ]
Okamoto, Koichi [3 ]
Kishino, Katsumi [1 ,2 ]
机构：
[1] Sophia Univ, Dept Engn & Appl Sci, Chiyoda Ku, 7-1,Kioi Cho, Tokyo 1028554, Japan
[2] Sophia Univ, Sophia Nanotechnol Res Ctr, Chiyoda Ku, 7-1,Kioi Cho, Tokyo 1028554, Japan
[3] Kyushu Univ, Inst Mat Chem & Engn, Nishi Ku, 744,Motooka, Fukuoka 8190395, Japan
来源：
APPLIED PHYSICS LETTERS | 2017年 / 111卷 / 13期
关键词：
EMITTING-DIODES; NANOWIRES; WELLS;
D O I：
10.1063/1.5005517
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
We demonstrate enhanced light emission in the orange and red regions from regularly arrayed InGaN/GaN nanocolumns due to the surface plasmon (SP) coupling. A maximum photoluminescence (PL) enhancement ratio of 5.2 is observed by coating the nanocolumns with an Au thin film. In addition, a 2.1-fold increase in the internal quantum efficiency is obtained. Comparison of an electromagnetic field simulation and a theoretical calculation based on the SP dispersion indicates that the SP originates from a standing wave mode arising from the periodic Au/dielectric interface. The column-diameter dependence of the PL enhancement ratio can be reasonably explained by considering the simulated electric field intensity. The periodic plasmonic nanostructure is effective for improving the emission efficiencies of InGaN-based light emitters in the orange and red regions. Published by AIP Publishing.
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页数：5
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