【作者】 薛飞； 孟子晖； 齐丰莲； 王丰彦； 薛敏；

【Author】 Fei Xue;Zihui Meng;Fenglian Qi;Fengyan Wang;Min Xue;School of Chemical Engineering and Environment,Beijing Institute of Technology;

【机构】 北京理工大学化工与环境学院；

【摘要】 光子晶体异质结构由不同光学带隙的光子晶体堆叠而成,在扩展光学带隙等方面具有重要的应用价值。目前光子晶体异质结构多是由三维光子晶体制备而成,制备周期较长,制备条件苛刻。本研究从简单快速的二维光子晶体制备入手[1],成功制备了基于二维光子晶体的异质结构。首先利用水/空气界面自组装方法制备单层聚甲基丙烯酸甲酯(PMMA)微球二维胶体晶体阵列(2-D CCA),接着以2-D CCA为基底选用不同尺寸的PMMA微球进行另一种粒径2-D CCA的自组装,得到了具有双重光学带隙的二维胶体晶体异质结构(2-D CCH)(Fig.1a)。反射光谱分析结果表明:2-D CCH与各单一结构光子晶体带隙相比,带隙明显增大,为各单一结构光子晶体带隙的叠加,且与不同结构的叠加顺序无关(Fig.1b)。更多还原

【Abstract】 A facile method for the fabrication of photonic crystal heterostructures(PCHs) composed of two 2-D colloidal crystalline array(CCA) monolayers with different sizes.The 2-D array monolayers are prepared by a simple and fast air/water interface self-assembly method.The 2-D poly(methyl methacrylate)(PMMA) particles array monolayers with different diameters(530,620nm) are deposited layer-by-layer to form 2-D PC-based PCHs.The results indicate that the PCHs formed from 2D array monolayers have a relative high quality.Reflection spectra show that there are two optical stop bands of the PCHSs formed from two layers of 2D array.更多还原