title: Combining surface plasmonic and light extraction enhancement on InGaN quantum-well light-emitters.
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.
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark. haou@fotonik.dtu.dk.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Fadil
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark. haou@fotonik.dtu.dk.
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Ou
authors.affiliation: Department of Applied Physics, Tokyo University of Science, 125-8585 Tokyo, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Iida
authors.affiliation: Department of Materials Science and Engineering, Meijo University, 468-8502 Nagoya, Japan.
authors.forename: Satoshi
authors.initials: S
authors.lastname: Kamiyama
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark. haou@fotonik.dtu.dk.
authors.forename: Paul Michael
authors.initials: PM
authors.lastname: Petersen
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Kgs. Lyngby, Denmark. haou@fotonik.dtu.dk.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Ou