Abstract
In this study, we demonstrated two-dimensional (2-D) photonic crystal
band-edge coupling operation in the ultraviolet wavelength range. The light
extraction enhancement was obtained from the photonic crystal structure with
an ultraviolet AlN/AlGaN distributed Bragg reflector (UVDBR). The DBR
provides a high reflectivity of 85% with 15-nm stopband width. A fivefold
enhancement in photoluminescence emission was also achieved compared with
the emission from the unpatterned area on the same sample at 374 nm
wavelength. We also study the photonic crystal bandedge coupling with
finite-difference time-domain and plane-wave expansion methods.
© 2010 IEEE
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