二维棋盘格子复式晶格的完全光子带隙研究  

Study of complete photonic band gap in two-dimensional chessboard of non-Bravais lattice

作　　者：汪静丽[1] 陈鹤鸣[1] 

机构地区：[1]南京邮电大学光电工程学院光纤通信研究所,南京210003

出　　处：《物理学报》2007年第2期922-926,共5页Acta Physica Sinica

基　　金：江苏省高技术研究计划项目(批准号:BG2005039)资助的课题~~

摘　　要：设计了一种棋盘格子复式晶格的二维光子晶体:在二维正方形格子中,把截面为正方形的柱子旋转45°,同时在每个原胞中心引入一个圆形截面的柱子构成的光子晶体结构.用平面波展开计算棋盘格子复式晶格的完全光子带隙,结果表明:棋盘格子复式晶格的完全光子带隙的Δω/ω比值几乎是普通棋盘格子的5倍,完全光子带隙的个数也增加.与其他复式结构相比较,发现其最佳的Δω/ω比值是一类粗锐复合结构光子晶体的2.1倍.A two-dimensional chessboard of non-Bravais lattice is designed in this paper： the square columns in photonic structure of a two-dimensional square lattice are rotated by 45°, and a cylinder is introduced into the center of each lattice unit cell. The complete photonic band gap in two-dimensional chessboard of non-Bravais lattice is calculated by the plane wave expansion method, The result shows that a gap width to midgap frequency ratio △ω/ω of chessboard non-Bravais lattice is almost 5 times that of the ordinary chessboard lattice, and the number of complete photonic band gaps is increased. Comparaed with other compound lattices, the optimal △ω/ω of chessboard non-Bravais lattice is 2.1 times that of a kind of compound lattices.

关 键 词：二维光子晶体 复式晶格 完全光子带隙 

分 类 号：O734[理学—晶体学]