【摘要】 将遗传算法应用于三角晶格光子晶体的禁带设计过程.考虑到可制备性,算法以第五能级下最大绝对禁带为优化目标,采用粗粒度像素表示原胞结构.通过引入傅里叶变换数据备份机制以提高禁带计算速度和算法效率,从而快速搜索到了具有较大绝对禁带的“介质空气柱”散射体形状的三角晶格光子晶体,其最大绝对禁带的相对宽度值(绝对禁带宽度和中心高度的比值)为23.8%.更多还原

【Abstract】 Genetic Algorithms (GAs) were used to design triangular lattice photonic crystals with large absolute band-gap. Considering fabricating issues, the algorithms represented the unit cell with large pixels and took the largest absolute band-gap under the fifth band as the objective function. By integrating Fourier transform data storage mechanism, the algorithms ran efficiently and effectively and optimized a triangular lattice photonic crystal with scatters in the shape of ‘dielectric-air rod’. It had a large absolute band gap with relative width (ratio of gap width to midgap) 23.8%.更多还原