摘要
Light extraction effects ora photonic crystal slab with a micrometer scale lattice constant are studied.A GaN light emitting diode(LED)with a photonic crystal slab is fabricated.The light extraction effects and the enhancement mechanism are investigated.From theoretical analysis,it is found that the characteristics of LED light emission are modulated by the photonic crystal slab.Experimental results show that the LED light emission intensity is enhanced by 38%due to guide mode extracting by the photonic crystal.
基金
Supported by the National High Technology Research and Development Program of China under Grant Nos 2008AA03Z402 and 2009AA03Z412
the National Natural Science Foundation of China under Grant Nos 60807010,60736037 and 60978067
the National Basic Research Program of China under Grant Nos 2009CB320300 and 2010CB934104.
