化学还原法向二氧化硅人工欧泊中填充Se

Infiltration of Se into Artificial Opal by Chemical Reduction

本文提出了一种新的调节人工欧泊晶体的光学带隙的方法。采用改进的溶剂蒸发法将单分散S iO2微球组装成在红外光区具有光子带隙的人工欧泊,采用化学还原法向欧泊中填充高折射率材料Se,改变其光学带隙特性。采用扫描电子显微镜(SEM)、X射线衍射和可见-近红外光谱仪(VIS-NIR)等对Se-S iO2三维光子晶体的形貌、结构和光学性能进行了观察测试。研究结果表明Se以纳米晶粒的形式均匀地包覆在S iO2微球表面,与相同晶格周期的S iO2光子晶体相比,Se-S iO2光子晶体的带隙发生明显的红移。

A new method has been proposed to modify the photonic band gap of synthetic opal. Chemical reduction method was used to infill the voids in the synthetic opal with Se. The resulted photonic crystals composed of Se-SiO2 composite are characterized by scanning electron microscopy, X-ray diffraction and VIS-NIR spectroscopy. It is shown that Se nanoparticles with high crystalline quality are homogeneously distributed on the surface of silica spheres after Se infilling, and the peak wavelength of reflectance spectrum suffers a red shift.