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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...
The fabrication of 2-dimensional (2D) photonic quasi crystals (PQCs) on gallium nitride (GaN) light emitting diodes (LEDs) is described. Fabrication was achieved using electron beam lithography (EBL) and, separately, by nano-imprint lithography (NIL).
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