利用无容器凝固BaTi_2O_5非晶球组装三维光子晶体及能带分析  

3D Photonic Crystals Assembled with Containerless-Solidified Amorphous BaTi_2O_5 Balls

作　　者：宋英翠[1,2] 李建强[2] 邱瑞云 李勃[1] 

机构地区：[1]清华大学深圳研究生院,广东深圳518055 [2]中国科学院过程工程研究所 湿法冶金清洁生产技术国家工程实验室,北京100190

出　　处：《稀有金属材料与工程》2013年第S1期115-118,共4页Rare Metal Materials and Engineering

基　　金：国家自然科学基金项目(51274182;50704031);国家科技支撑计划项目(2012BAA03B03A);北京市自然科学基金项目(2112039);深圳市基础研究基金项目(JC201105180802A)

摘　　要：应用无容器凝固法制备构造光子晶体的微球,获得批量成分均匀、尺寸均一的高折射率钛氧玻璃非晶球,并通过空间限位组装排列成三维蛋白石结构光子晶体。用平面波展开法模拟不同折射率的球所堆积的光子晶体的能带结构,分析了折射率对带隙位置和宽度的影响。结果表明,非晶球组成的三维蛋白石结构形成了不完全带隙,在该结构中沿[111]方向上,带隙随折射率的增大逐渐变窄并且向低频方向移动。Containerless solidification processing was introduced for the first time to fabricate 3D photonic crystal. Micrometer-sized amorphous BaTi2O5 spheres with perfect spherical shape and superior optical properties such as high refractive index (n=2.15) were produced via containerless solidification processing. 3D opal photonic crystal was assembled with these spheres by spaced-confined method using a box of precisely controlled size. Plane-wave method was implemented to calculate band structures and analyze influence of refractive index on band-gaps. The obtained results show that this 3D opal structure has incomplete band-gap, and band-gap narrows and moves toward lower frequency with the increase of refractive index along the [111] direction. The results demonstrate that the containerless solidification processing provides an approach to fabricate superior metastable spherical materials which can be used to form 3D opal photonic crystals.

关 键 词：无容器凝固 光子晶体 BaTi2O5 钛氧非晶球 

分 类 号：O734[理学—晶体学]