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8 January 2007 The effect of structure perturbation on PBG of one-dimensional photonic crystals
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By introducing structure perturbation coefficients with different levels, relevant effects on PBG and density of mode (DOM) in 1D photonic crystal had been detailedly discussed under specifying numbers of bilayer and contrast of refractive index in this paper. Numerical simulation indicates that there are remarkable influences on optical properties of 1D photonic crystal resulted by structure perturbation, especially for PBG location and DOM at band edge. Generally, both PBG shifting and shrinking occurs due to disruptive periodicity. In specific case, especially along with perturbation coefficient increasing, it is found that PBG is extended obviously and the higher DOM at the band edge also can be obtained. According to this, some conclusions had been drawn which are significant to developing omnidirectional reflectors, band edge lasers and other devices based 1D photonic crystals.
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Xia Li, Yu-rong Jiang, Wei Xue, Zhi-nong Yu, and Hua-qing Wang "The effect of structure perturbation on PBG of one-dimensional photonic crystals", Proc. SPIE 6414, Smart Structures, Devices, and Systems III, 64141J (8 January 2007); doi: 10.1117/12.695204;

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