Vol.5 No.8 (August 2015)
Effect of the Defect Thickness of Random Fluctuation on the PBG of One-Dimensional Photonic Crystals
The effect of thickness of random fluctuation on the photonic band gap (PBG) of one-dimensional photonic crystals (PCs) is analyzed by the characteristic matrix method. The results show that the omnidirectional band gap and the gap ratio of the PCs change little according to the value of random degree equal to 0.03. Meanwhile, the transmission ratio also varies little in the defect layer. Both the omnidirectional band gap and the gap ratio of the PCs slightly vary when the random degree can reach to 0.3. However, the transmission ratio can only reach to 0.4 of the original one in the defect layer. There is only one omnidirectional band gap when the value of random degree reaches to 0.5. Meanwhile, the transmission ratio decreases to 0 in the defect layer. This study is valuable to the design and the preparation of the one-dimensional PCs.
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