各向异性金刚石结构的光子晶体(英文)  

Anisotropic Photonic Crystals with Diamond Lattice

作　　者：詹仪[1] 郑义[2] 李效增[1] 李秀霞[1] 

机构地区：[1]曲阜师范大学印刷学院,山东日照276826 [2]北京交通大学理学院,北京100044

出　　处：《光子学报》2009年第7期1713-1716,共4页Acta Photonica Sinica

基　　金：Supported by National Natural Science Foundation(60478021);project of Shandong Province Higher Educational Science and Technology Program(J08L114)

摘　　要：基于平面波展开法,理论分析了填充率、介质各向异性的程度对单轴金刚石结构三维光子晶体禁带的影响.结果表明,当填充率和介质各向异性取合适的值,单轴各向异性金刚石结构光子晶体存在着完全带隙.介质各向异性的引入使该晶体的带隙变窄甚至完全关闭.在各个布里渊区域里,带隙率和带隙宽度随介质各向异性程度的变化而变化.各向异性的引入为调整光子禁带提供了一种方法.With the plane-wave expansion method, the photonic-band-gap structure for a diamond lattice consisting of a uniaxial anisotropic-dielectric sphere in air was studied through tuning three inequivalent 1/3 Brillouin zone. The results show that choosing the suitable range of filling fraction and anisotropy, a full band gap opens in the whole Brillouin zone for this anisotropic PBG structure. The gap to midgap ratio and bandgap width is tunable as a result of the changing extraordinary axis orientation of the uniaxial sphere. Anisotropy in sphere dielectric function is found to narrow or even close band gaps. The band gap width and close rate are affected by the extraordinary axis directions and anisotropy. The results in turn suggest a potential approach to obtain some degree of tunability of the photonic band structures.

关 键 词：晶体学 光子禁带 平面波展开法 介质各向异性 

分 类 号：O484.1[理学—固体物理] TN011[理学—物理]