【作者】 刘小龙； 张霞； 黄永清； 郑龙； 王亚苗； 任晓敏；

【Author】 LIU Xiao-long,ZHANG Xia,HUANG Yong-qing,ZHENG Long,WANG Ya-miao,REN Xiao-min(Key Laboratory of Information Photonics and Optical Communications,Beijing University of Posts and Telecommunications,Ministry of Education,Beijing 100876,China)

【机构】 北京邮电大学信息光子学与光通信教育部重点实验室；

【摘要】 在光子晶体光纤沿轴向分布的空气孔中沉积特定的金属材料(通常为金、银),光纤中传输光渗透到空气孔的倏逝波能够激发金属表面等离子体。此时,对吸入到光子晶体光纤孔隙中的液体样品进行拉曼散射测试,由于表面等离子体的存在,拉曼谱线强度会得到明显增强。这种现象称为表面增强拉曼散射效应。基于光子晶体光纤的表面增强拉曼散射效应可以应用于化学、生物试剂探测,并且在灵敏度等许多方面有着传统探测手段所没有的优点。文章对这种新型探测器进行了研究,提出了一种新颖的水浴加热还原银氨溶液进行银沉积的方法,并进行了实验验证。这种方法的优点是简单易行,成本低,沉积量可以通过反应物浓度进行控制。更多还原

【Abstract】 Photonic crystal fibers(PCFs) provide hollow holes for the deposition of various materials.When Au and Ag are deposited onto the sidewalls of hollow holes within the PCFs,the evanescence wave of the guided modes resonates with the metal and stimulates surface plasmons.Then large Raman response detected when analyte molecules are infiltrated within the structures due to the enhancement effect of surface plasmons.This is so-called surface-enhanced Raman scattering(SERS) based on photonic crystal fiber substrates and can be used for the detecting of chemical and biological molecules.These substrates offer significant benefits over conventional detection methods.In this paper,a new approach for the deposion of Ag nanopaticles into PCFs is demonstrated.The depositing process is simple and the amount of the Ag can be easily controlled by tuning the concentration of the reactant.更多还原