Enhancement of green emission from InGaN/GaN multiple quantum wells via coupling to surface plasmons in a two-dimensional silver array

Cheng Hsueh Lu, Chia Chun Lan, Yen Lin Lai, Yun Li Li, Chuan-Pu Liu

Research output: Contribution to journalArticle

82 Citations (Scopus)

Abstract

A novel approach to enhancing the emission efficiency of InGaN/GaN multiple quantum wells via coupling to surface plasmons (SPs) in a periodic two-dimensional silver array is demonstrated. A higher internal quantum efficiency and a higher light extraction efficiency are simultaneously achieved by engraving an array of nanoholes into the p-GaN cladding layer, followed by partial filling with silver. By top excitation and collection from the top of the Ag-incorporated light emitting diodes (LEDs), a 2.8-fold enhancement in peak photoluminescence intensity is demonstrated. The proposed nanoengraving technique offers a practical approach to overcoming the limitation of the exponentially decayed SP field without sacrificing the thickness of the p-GaN layer and to controlling the effective coupling energy. The approach is feasible for high-power lighting applications.

Original languageEnglish
Pages (from-to)4719-4723
Number of pages5
JournalAdvanced Functional Materials
Volume21
Issue number24
DOIs
Publication statusPublished - 2011 Dec 20

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Biomaterials
  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Electrochemistry

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