摘要
研究了以硅为背景介质周期性排列的等边三角形气孔构成的三角晶格二维光子晶体,把平面波展开法用于光子晶体能带结构的数值研究,分别改变等边三角形气孔边长、晶格常数和晶格基元旋转角度,研究带隙变化规律。研究结果表明:三角形气孔边长、晶格常数和晶格基元旋转角度的适当改变可以使光子晶体出现完全带隙,优化结构参数给出了一个完全带隙。
A two-dimension photonic crystal with triangular air hole was designed in silicon backgroud material.Plane-wave expansion method is used in study of numerical value of energy band structure of 2D photonic crystal.The band gaps were investigated by changing the side length of triangular air hole,lattice period and rotation angle of elements.Research results show that the proper choice of the side length of triangular air hole,lattice period and rotation angle will make the photonic crystals have absolute band gaps.A large absolute band gap is found by optimizing the parameters.
出处
《激光与红外》
CAS
CSCD
北大核心
2010年第7期766-769,共4页
Laser & Infrared
基金
山东省自然科学基金课题(No.ZR2009FM031)资助
关键词
光子晶体
三角形气孔
三角晶格
平面波展开法
完全带隙
photonic crystal
triangular air hole
triangular lattice
plane-wave expansion method
absolute band gap
