介质/介质和金属/介质光子晶体的光子能带和光子态密度  

Photonic Band Structure and State Density of Dielectric/Dielectric and Metal/Dielectric Photonic Crystals

作　　者：宗易昕 夏建白[1] 武海斌[1] 

机构地区：[1]中国科学院半导体研究所,北京100083

出　　处：《激光与光电子学进展》2016年第3期185-190,共6页Laser & Optoelectronics Progress

基　　金：国家重点基础研究发展计划(2011CB922200);国家自然科学基金(605210010)

摘　　要：采用改进的平面波展开方法计算一维和二维金属/介质结构光子晶体的光子能带,分析光子禁带特性与介质、金属层厚度的关系,并与介质/介质光子晶体进行比较。结果表明含金属的光子晶体更易出现光子带隙,可用作宽带隙材料,更易于研究光子晶体内自发辐射禁戒和光子局域等现象。计算圆柱型和圆孔型两种二维光子晶体的光子态密度,所得结果与光子能带结构相吻合。结合实际材料计算一维金属/介质光子晶体的光子能带结构与材料厚度的关系,结果表明随着介质层厚度的增加或金属层厚度的减少,透射光的波长会增加。Photonic band structures of one-and two-dimensional metal/dielectric photonic crystals are studied with the improved plane wave expansion method, the relationships between the property of the band-gap and the thicknesses of the dielectric and metallic mediums are analyzed, and the results are compared with those of dielectric/ dielectric photonic crystals. The results reveal that photonic crystals containing metal mediums can be used to study such phenomena as the spontaneous radiation suppression and photon localization. The state densities of cylinder and hole type two-dimensional photonic crystals are calculated and the results are in good agreement with the band structures. The relationships between the band structures and the thicknesses of metal and dielectric layers of real one-dimensional metal/dielectric photonic crystals are also analyzed. The results show that with the increase of dielectric layer＇s thickness or the decrease of metallic layer＇s thickness, the wavelength of the transmitted light increases.

关 键 词：材料 光子晶体 光子能带 平面波展开方法 态密度 光子禁带 

分 类 号：O436[机械工程—光学工程]