DocumentCode
903099
Title
Enhanced Light Extraction by Photonic Quasi-Crystals in GaN Blue LEDs
Author
Shields, Philip A. ; Charlton, Martin D.B. ; Lee, Tom ; Zoorob, Majd E. ; Allsopp, Duncan W E ; Wang, Wang N.
Author_Institution
Univ. of Bath, Bath, UK
Volume
15
Issue
4
fYear
2009
Firstpage
1269
Lastpage
1274
Abstract
The far-field profile of photonic quasi-crystal patterned and unpatterned LEDs, fabricated from commercial epitaxial substrates by electron beam lithography, has been measured prior to lapping and dicing. Emission enhancements reach a maximum of 62%, and are strongly dependent on the filling factor. Qualitative agreement is achieved between 2-D finite-difference time-domain calculations and the experimental data.
Keywords
III-V semiconductors; electroluminescence; electron beam lithography; finite difference time-domain analysis; gallium compounds; light emitting diodes; optical fabrication; optical materials; photonic crystals; wide band gap semiconductors; 2D finite-difference time-domain calculation; blue LED; dicing; electroluminescence; electron beam lithography; enhanced light extraction; epitaxial substrate; lapping; optical fabrication; photonic quasicrystal; Electroluminescence; LEDs; extraction; photonic crystals;
fLanguage
English
Journal_Title
Selected Topics in Quantum Electronics, IEEE Journal of
Publisher
ieee
ISSN
1077-260X
Type
jour
DOI
10.1109/JSTQE.2009.2016674
Filename
4957077
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