Nanostructuring of an AlGaInP light emitting diode for surface plasmon enhanced emission of light output

✍ Scribed by Perks, R. M. ;Kettle, J. ;Lalev, G. M. ;Dimov, S.

• Publisher: John Wiley and Sons
• Year: 2008
• Tongue: English
• Weight: 317 KB
• Volume: 205
• Category: Article
• ISSN: 0031-8965
• DOI: 10.1002/pssa.200778898

✦ Synopsis

Abstract

This work describes a successful post fabrication method of applying a plasmonic grating to the surface of a mounted AlGaInP LED device. A Carl Zeiss 1540 XB Focused Ion beam system was used to mill holes in a thin gold layer with a periodicity of around 540 nm. Measurements of the total light output of the device compared with a standard un‐textured device show that the plasmonic grating was found to significantly affect the light output characteristics such that the overall light output was reduced. This is attributed to the fact that only p‐polarised light can interact with the hole array. Furthermore, the onset of saturation in the textured device was not evident as compared with the un‐textured device. This is attributed to improved current spreading in the device due to the top gold layer. (© 2008 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)