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作 者:张雁茗 逯贵祯[1] ZHANG Yan-ming;LU Gui-zhen(Communication University of China,Beijing 100024,China)
机构地区:[1]中国传媒大学,北京100024
出 处:《中国传媒大学学报(自然科学版)》2017年第3期31-33,共3页Journal of Communication University of China:Science and Technology
摘 要:介绍了一种使用COMSOL用数值计算方法仿真2D光子晶体色散图的方法,通过COMSOL将Z方向无限延伸的介质介质圆柱阵列形成的二维三角晶格光子晶体等效为二维平面进行仿真,并采用了独特的矩形结构作为该三角晶格光子晶体的单元晶格,相比传统的用正六边形作为单元晶格的方法,建模与设置Floquet周期边界条件的过程更为简单。成功仿真出了该光子晶体的色散图,并与参考文献中的结果进行了对比分析,带隙、色散曲线与文献中结果基本吻合,证明了这种仿真方法的正确性。A method of simulating 2D photonic crystal dispersion by using COMSOL numerical simulation method is introduced.The two-dimensional triangular lattice photonic crystal formed by the cylindrical array of Z-direction infinite extension is equivalent to a two-dimensional plane by COMSOL.Using the unique rectangular structure as the lattice of the triangular lattice photonic crystal,it is simpler to model and set the Floquet periodic boundary condition than the traditional method of using the regular hexagon as a lattice.The dispersion diagram of the photonic crystal was successfully simulated and compared with the results in the reference.The bandgap and dispersion curves were consistent with the results in the literature,which proved the correctness of the simulation method.
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