一种胶体光子晶体修饰的光纤  

A fiber decorated by colloidal photonic crystal

作　　者：刘青[1] 王鸣[1] 郭文华[1] 闫海涛[1] 喻平[1] 

机构地区：[1]南京师范大学物理科学与技术学院江苏省光电技术重点实验室,南京210046

出　　处：《物理学报》2010年第10期7086-7090,共5页Acta Physica Sinica

基　　金：江苏省科技支撑计划(批准号:BE2008138)资助的课题~~

摘　　要：设计了一种胶体光子晶体修饰的光纤.采用恒温快速蒸发法直接在经切割刀处理后的光纤端面生长胶体晶体,再与另一根切割后的光纤在毛细玻璃管中完成对接,制备成胶体光子晶体修饰的光纤.用扫描电子显微镜和光谱分析仪对样品的形貌、结构以及光学特性进行分析.实验结果表明,粒径为640nm、体积分数约为0.5%的SiO2胶体微球溶液在60℃的情况下沉积,大约12h后可得到质量较高的胶体光子晶体.在SEM下,观察到端面的胶体晶体为面心立方(fcc)结构.透射光谱证明,该结构在(111)面上具有光子晶体的带隙性质,带隙中心波长为1383nm。A method of fabricating fiber decorated by colloidal photonic crystal is devised.Three-dimensional nanostructure colloidal crystal on the end face of optical fiber was grown by isothermal heating evaporation induced self-assembly method.The optical fiber with colloidal crystals was connected to another lapped optical fiber by glass capillary,and the fiber decorated by colloidal photonic crystal was formed.The nanostructural morphology of the colloidal crystal was examined by SEM.The optical characteristics of the colloidal crystal was also analyzed.The spectral feature of the optical fiber colloidal crystal was measured by using optical sensing analyzer.It has been found that the optimal conditions for a good quality crystal are an evaporation temperature of 40 ℃ with a volume fraction of 0.5% and a deposition time of 12 hours.SEM reveals that the colloidal crystal on the end face of optical fiber has face-centered-cubic structure.Transmission measurement shows the existence of photonic band gap,and the stopgap is located at 1365 nm.

关 键 词：胶体光子晶体 带隙 自组装 中心波长 

分 类 号：TN253[电子电信—物理电子学]