Surface plasmon enhanced super bright InGaN light emitter

Abstract

We use surface plasmons to increase the light emission efficiency from InGaN/GaN quantum wells by covering these with thin metallic films. Large luminescence enhancements were measured when silver or aluminum layers are deposited 10 nm above an InGaN light emitting layer, whereas no such enhancements are obtained from gold coated samples. The internal quantum efficiencies of quantum wells before and after metallization were determined from the temperature dependence of the photoluminescence intensity. Our results indicate that the use of surface plasmons will lead to a new class of very bright light emitting diodes, and highly efficient solid-state light sources.

Plasmon-enhanced molecular fluorescence from an organic film in a tunnel junction

“…Surface plasmon enhancement is not a quite unacquainted concept. We have met it before in other techniques of light detection such as PL 12,13 and Raman scattering. 14,15 Some decades ago, Fleischmann 14 and then Van Duyne et al 15 sequentially reported huge Raman intensities observed under certain conditions.…”

The influence of the coating metals with various work function on the photoluminescence of a GaN-based blue LED wafer

“…However, such explanation has been proved incorrect to some extent recently. It is reported by Okamoto et al that light emission efficiency from InGaN QWs could be improved by controlling the energy transfer between QW emitters and surface plasmons (SPs) [4,5,8]. In their work, the sample was similar to a blue InGaN SQW LED wafer, except that the surface layer which called 'GaN cap layer' by the authors was not doped.…”

Optical characteristics of YVO_4:Eu^3+ phosphor in close proximity to Ag nanofilm: emitting layer for mirror-type displays

“…To achieve this aim, we propose a mirror display structure that uses Ag nanofilm as a reflector. Previous research has shown that propagating surface plasmons originating from metallic film can enhance the fluorescence and phosphorescence from semiconductors, organic molecules, and rare-earth ion complexes [8][9][10]. In this paper, we propose a phosphor layer structure as a component of a mirror-type AC plasma display in which Ag nanofilm functioning as a reflector is located near the phosphor layer.…”