title: Surface plasmon coupling dynamics in InGaN/GaN quantum-well structures and radiative efficiency improvement.
abstract: Surface plasmonics from metal nanoparticles have been demonstrated as an effective way of improving the performance of low-efficiency light emitters. However, reducing the inherent losses of the metal nanoparticles remains a challenge. Here we study the enhancement properties by Ag nanoparticles for InGaN/GaN quantum-well structures. By using a thin SiN dielectric layer between Ag and GaN we manage to modify and improve surface plasmon coupling effects, and we attribute this to the improved scattering of the nanoparticles at the quantum-well emission wavelength. The results are interpreted using numerical simulations, where absorption and scattering cross-sections are studied for different sized particles on GaN and GaN/SiN substrates.
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Lyngby, Denmark.
authors.forename: Ahmed
authors.initials: A
authors.lastname: Fadil
authors.affiliation: Department of Applied Physics, Tokyo University of Science, Katsushika, 125-8585 Tokyo, Japan.
authors.forename: Daisuke
authors.initials: D
authors.lastname: Iida
authors.affiliation: School of Optical and Electronic Information, Huazhong University of Science and Technology, 430074 Wuhan, China.
authors.forename: Yuntian
authors.initials: Y
authors.lastname: Chen
authors.affiliation: Institute of Semiconductors, Chinese Academy of Sciences, 100083 Beijing, China.
authors.forename: Jun
authors.initials: J
authors.lastname: Ma
authors.affiliation: Light Extraction ApS, 2800 Lyngby, Denmark.
authors.forename: Yiyu
authors.initials: Y
authors.lastname: Ou
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Lyngby, Denmark.
authors.forename: Paul Michael
authors.initials: PM
authors.lastname: Petersen
authors.affiliation: Department of Photonics Engineering, Technical University of Denmark, 2800 Lyngby, Denmark.
authors.forename: Haiyan
authors.initials: H
authors.lastname: Ou