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

Takao Oto, Kazuma Kikuchi, Koichi Okamoto, Katsumi Kishino

研究成果: Contribution to journalArticle査読

4 被引用数 (Scopus)

抄録

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.

本文言語英語
論文番号133110
ジャーナルApplied Physics Letters
111
13
DOI
出版ステータス出版済み - 9 25 2017

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)

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