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介绍一种方法来调节和优化二维光子晶体不同能带之间的带隙.在单胞中任意位置增加一个基元,可以调节不同能带之间的带隙.而且固定两个基元的最佳位置,调节两个基元柱体边长,可以找到一个合适的配置,使各自的带隙相对带宽达到更大值.同时结果也表明双基元情况下,不同能带之间带隙优化对系统对称性要求不同,频率越高处的带隙优化要求系统对称性越低.
A method is proposed to tune and optimize the bandgap between different energy bands in a two-dimensional photonic crystal.Adding one element at any position in the unit cell can adjust the bandgap between different energy bands, Optimal position, adjust the length of the two sides of the two cell columns, you can find a suitable configuration, so that the relative bandwidth of their band gap to a larger value.At the same time the results also show that the case of dual-base band gap between different bands Optimization requires symmetry of the system is different, the higher the frequency band gap optimization requires lower system symmetry.