Title :
Directional Control of Light-Emitting-Diode Emission Via a Subwavelength-Apertured Metal Surface
Author :
Harries, Michael D. ; Summers, Huw D.
Author_Institution :
Sch. of Phys. & Astron., Cardiff Univ.
Abstract :
A thin Au film with a hexagonal array of subwavelength apertures has been integrated onto a semiconductor light-emitting diode. This produces a highly directional far-field pattern with a strong polarization dependence and alters the spectral shape of the light emission from the semiconductor. A two-dimensional k-space analysis of the experimental data shows good agreement with a simple model of surface plasmon to photon coupling via the periodic structure of the metal film
Keywords :
gold; integrated optics; integrated optoelectronics; light emitting diodes; light polarisation; metallic thin films; periodic structures; spectral line breadth; surface plasmons; Au; directional control; directional far-field pattern; hexagonal array; light emission; light-emitting-diode emission; metal film; metal surface; periodic structure; photon coupling; polarization dependence; semiconductor light-emitting diode; spectral shape; subwavelength apertures; surface plasmon; thin Au film; two-dimensional k-space analysis; Apertures; Gold; Light emitting diodes; Lighting control; Optical arrays; Optical polarization; Periodic structures; Plasmons; Semiconductor films; Spectral shape; Light-emitting diodes (LEDs); optical beams; plasmons;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2006.884243
