Abstract
We analyze the effects of disorder in a photonic crystal (PC) on the extraction efficiency of a light-emitting diode (LED) by using a full-vectorial finite-difference time-domain method. The extraction efficiency of the ordered PC LED (EEOPL) and the extraction efficiency of the disordered PC LED (EEDPL) are compared. The physical explanation for the difference between the EEOPL and EEDPL is given through the mechanism of the guided modes and leaky modes. When the frequencies are in the leaky mode region, the EEOPL and EEDPL are comparable even if some disorder exists in the fabrication process.
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