Open AccessExperimental observation of electroluminescence enhancement on green LEDs mediated by surface plasmons
Author(s) -
Kwang-Geol Lee,
KiYoung Choi,
Jinha Kim,
Seok Ho Song
Publication year - 2014
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.22.0a1303
Subject(s) - light emitting diode , materials science , electroluminescence , voltage droop , optoelectronics , surface plasmon , plasmon , optics , quantum efficiency , power (physics) , layer (electronics) , nanotechnology , physics , quantum mechanics , voltage divider
We experimentally demonstrate the 1.5-fold enhancement of the electroluminescence (EL) of surface-plasmon (SP)-mediated green LEDs. On the p-clad surface of InGaN/GaN multi-quantum well LEDs, a 2-dimensional, second-order grating structure is textured and coated with an Ag electrode. With this setup, a larger EL enhancement factor is obtained at a higher injected current, which suggests that SP-LEDs can be a possible solution to efficiency droop, which is one of the main problems in developing high-power LEDs. Details regarding the implementation of our device are discussed.