Improving light extraction efficiency of PhC LED

In this work we focus on improving light extraction efficiency of PhC LED. Studied LED structure was based on GaAs/AlGaAs material system. 1D PhC was patterned on the top of the LED structure with 3 different periods (500 nm, 600 nm, 800 nm). Several studies confirm improving light extraction efficiency of studied LED structure using PhC patterning. In this work, additional thin Au or ZnO layer was deposited on the top of the patterned PhC. Additional layers improved light extraction efficiency (LEE) for PhC LED. The best results were achieved for Au deposited PhC LED sample with LEE enhancement of 59%.