Title: Anisotropy of light extraction from two-dimensional photonic crystal light-emitting diodes
Authors: Lai, Chun-Feng
Kuo, H. C.
Chao, C. H.
Hsueh, H. T.
Wang, J.-F. T.
Yeh, W. Y.
Chi, J. Y.
Department of Photonics
Issue Date: 17-Sep-2007
Abstract: Anisotropic light extraction of photonic crystal (PhC) light-emitting diodes in the azimuthal direction has been investigated with an annular structure of triangular PhC lattice. The optical images of the photoluminescence light extraction are obtained with laser excitation. For increasing lattice constant, sixfold symmetric patterns with varying numbers of petals in multiples of six are observed and analyzed. A map of the anisotropy for various lattice constants and numerical apertures is constructed. Several features of light propagations associated with the PhC are observed including the focusing and collimating behaviors.(c) 2007 American Institute of Physics.
URI: http://dx.doi.org/10.1063/1.2789399
ISSN: 0003-6951
DOI: 10.1063/1.2789399
Volume: 91
Issue: 12
End Page: 
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