Picture of smart phone in human hand

World leading smartphone and mobile technology research at Strathclyde...

The Strathprints institutional repository is a digital archive of University of Strathclyde's Open Access research outputs. Strathprints provides access to thousands of Open Access research papers by University of Strathclyde researchers, including by Strathclyde researchers from the Department of Computer & Information Sciences involved in researching exciting new applications for mobile and smartphone technology. But the transformative application of mobile technologies is also the focus of research within disciplines as diverse as Electronic & Electrical Engineering, Marketing, Human Resource Management and Biomedical Enginering, among others.

Explore Strathclyde's Open Access research on smartphone technology now...

InGaN nano-ring structures for high-efficiency light emitting diodes

Choi, H.W. and Jeon, C.W. and Liu, C. and Watson, I.M. and Dawson, M.D. and Edwards, P.R. and Martin, R.W. and Tripathy, S. and Chua, S.J. (2005) InGaN nano-ring structures for high-efficiency light emitting diodes. Applied Physics Letters, 86 (2). ISSN 0003-6951

[img]
Preview
PDF
Choi2005APL86.pdf - Final Published Version

Download (484kB) | Preview

Abstract

A technique based on the Fresnel diffraction effect for the fabrication of nano-scale site-controlled ring structures in InGaN/GaN multi-quantum well structures has been demonstrated. The ring structures have an internal diameter of 500 nm and a wall width of 300 nm. A 1 cm-1 Raman shift has been measured, signifying substantial strain relaxation from the fabricated structure. The 9 nm blueshift observed in the cathodoluminescence spectra can be attributed to band filling and/or screening of the piezoelectric field. A light emitting diode based on this geometry has been demonstrated.