Open AccessEmission characteristics of photonic crystal light-emitting diodes
Author(s) -
Ali Z. Khokhar,
Keith Parsons,
Graham Hubbard,
I. M. Watson,
Faiz Rahman,
D.S. Macintyre,
Chang Xiong,
D. Massoubre,
Zheng Gong,
Erdan Gu,
Nigel P. Johnson,
Richard M. De La Rue,
Martin D. Dawson,
Steven Abbott,
Martin D. B. Charlton,
Martin Tillin
Publication year - 2011
Publication title -
applied optics
Language(s) - English
Resource type - Journals
ISSN - 0003-6935
DOI - 10.1364/ao.50.003233
Subject(s) - materials science , light emitting diode , photonic crystal , optoelectronics , nanoimprint lithography , electroluminescence , electron beam lithography , optics , photonics , photoluminescence , lithography , diode , light emission , wafer , resist , fabrication , nanotechnology , medicine , alternative medicine , physics , pathology , layer (electronics)
Experimentally measured optical properties of photonic crystal LEDs are reported here. Photonic crystal and photonic quasi-crystal structures were fabricated on GaN epilayer LED wafer material using both direct-write electron beam lithography and nanoimprint lithography. Some of these structures were processed to make finished LEDs. Both electroluminescence and photoluminescence measurements were performed on these structures. Devices were characterized for their current-voltage characteristics, emission spectra, far-field emission pattern, and angular emission pattern. These results are useful for fabricating photonic crystal LEDs and assessing their operational properties.
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