介质柱型二维Triangular格子光子晶体的禁带特性

• 作 者: 杨毅彪 王拴锋 李秀杰 王云才 梁伟
• 机 构: 太原理工大学理学院物理系,太原理工大学材料科学与工程学院,
• 出 处: 物理学报
• 发表日期: 2010年07期
• 关键词: 光子禁带 光子晶体 Triangular 平面波展开法 介质柱 介质折射率 柱型 三角格子 晶格结构 光子带隙

采用平面波展开法数值计算了空气背景中由圆形、正六边形和正方形介质柱构造的二维三角晶格光子晶体禁带结构,并研究了介质方柱旋转角度、介质折射率和填充比对完全光子禁带宽度的影响.结果表明,在低频区,介质方柱旋转17°时,出现最大完全光子禁带,且最大禁带宽度随介质折射率的变化较为稳定.在高频区,介质方柱旋转30°时,完全光子禁带宽度最大;且介质材料折射率n=2.2时即出现完全光子禁带,n=2.6时,完全光子禁带达到最大.

A two-dimensional triangular lattice photonic band gap structure constructed by circular, regular hexagonal and square dielectric columns in the air background is numerically calculated by the plane wave expansion method. The rotation angle, medium refractive index and filling ratio Complete photon forbidden band width.The results show that in the low frequency region, the maximum complete photon forbidden band appears when the square cylinder rotates by 17 °, and the maximum forbidden band width changes more stable with the medium refractive index.In the high frequency region, When the square cylinder rotated by 30 °, the complete photon forbidden band width was the largest. When the refractive index of the dielectric material was n = 2.2, the complete photon forbidden band appeared, and the complete photon forbidden band reached the maximum when n = 2.6.