Combining surface plasmonic and light extraction enhancement on InGaN quantum-well light-emitters

Ahmed Fadil, Yiyu Ou, Daisuke Iida, Satoshi Kamiyama, Paul Michael Petersen, Haiyan Ou

Research output: Contribution to journalJournal articleResearchpeer-review

Abstract

Surface plasmon coupling with light-emitters and surface nano-patterning have widely been used separately to improve low efficiency InGaN light-emitting diodes. We demonstrate a method where dielectric nano-patterning and Ag nanoparticles (NPs) are combined to provide both light extraction and internal quantum efficiency enhancement for InGaN/GaN quantum-well light-emitters. By fabricating dielectric nano-rod pattern on the GaN surface, an optical coating that improves the light extraction is obtained, and furthermore has a low refractive index which blue-shifts the plasmonic resonance of Ag NPs towards the emission wavelength. We investigate emission components from both the GaN and sapphire surface of the semiconductor crystal and show that Ag NPs on dielectric nano-pattern compared to a planar surface, result in a stronger enhancement
Original languageEnglish
JournalNanoscale
Volume8
Pages (from-to)16340-16348
ISSN2040-3364
DOIs
Publication statusPublished - 2016

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