亚波长多悬挂芯SERS微纳结构光纤探针的优化设计与制备

项目名称： 亚波长多悬挂芯SERS微纳结构光纤探针的优化设计与制备

项目编号： No.61308046

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 耿优福

作者单位： 深圳大学

项目金额： 25万元

中文摘要： 微结构光纤表面增强拉曼探针是近年来光纤拉曼探针向微纳结构、精细化纵深发展的典范，在表面分析、催化作用、生物医学传感、痕量检测与分析等领域具有重要应用潜力。本项目针对普通微结构光纤探针中倏逝场功率过低、测量过程需要添加金属纳米颗粒的"标记性"测量问题，我们提出一种优化的双包层亚波长多悬挂芯微纳结构光纤模型，并以此为基础制作表面增强拉曼光纤探针。理论上，研究倏逝场功率因子随亚波长多悬挂芯微纳光纤结构的变化规律；实验上，研究表面增强拉曼光纤探针中金属纳米颗粒的高效组装方法、拉曼信号光的激发与收集。最终解决微纳结构光纤的模型设计、低损耗传输及金属纳米颗粒的高效组装等关键问题，制作出具有低损耗、高倏逝场、高增益的表面增强拉曼微纳光纤探针，为拉曼光谱的有效获取提供一种新手段、新方法。

中文关键词： 表面增强拉曼散射；微结构光纤；光纤拉曼探针；；

英文摘要： Surface enhanced Raman scattering(SERS) fiber probe based on microstructured fiber is the nonesuch of fiber probe with more precise and micro/nano structures, which shows great potentiality in surface analysis, catalysis, biomedicine sensing, trace monitor and analysis areas. In traditional microstructured SERS fiber probe, the power factor of evanescent wave in total transmission power is very small and the labels of metal nanoparticle need to be added to enhance the Raman signal. So to settle those problems, an optimized structure of subwavelength multi-suspended-core micro/nano fiber with doube cladding is proposed, and based on that,a SERS micor/nano fiber probe is fabricated. The features of power factor changing with micro/nano structure fiber are researched in theory; efficient assembly of metal nanoparticle to our proposed fiber and excitation and collection of Raman signal are studyed in expriment. Finally with resolving the crucial problems includding the design of fiber model, low loss transmission and assembly of metal nanoparticle with high efficient, a SERS micro/nano fiber probe with low transmission loss, high evanscent wave power and high Raman signal gain will be constructed, which could provide an alternative method to obtain Raman spectra.

英文关键词： surface enhanced Raman scattering；microstructured fiber；fiber Raman probe；；