2×2熔锥光纤表面增强拉曼散射实验

doi:10.3969/j.issn.1007-2861.2012.01.002

上海大学学报(自然科学版) ›› 2012, Vol. 18 ›› Issue (1): 7-11.doi: 10.3969/j.issn.1007-2861.2012.01.002

2×2熔锥光纤表面增强拉曼散射实验

陈振宜，陈娜，胡玲，王廷云，庞拂飞，刘琳

上海大学特种光纤与光接入网省部共建重点实验室，上海 200072

收稿日期:2011-12-16 出版日期:2012-02-29 发布日期:2012-02-29
通讯作者: 陈振宜(1959～)，男，研究员，博士生导师,博士,研究方向为特种光纤及其器件与传感等. E-mail:zychen@mail.shu.edu.cn E-mail:zychen@mail.shu.edu.cn
基金资助:
国家自然科学基金资助项目（61027015，61107076）；上海市科委重点实验室资助项目（10DZ2210900）；上海市重点学科建设资助项目（S30108）；上海大学研究生创新基金资助项目（SHUCX112146）

Experiment of 2×2 Fused Fiber Surface-Enhanced Raman Scattering

CHEN Zhen-yi,CHEN Na,HU Ling,WANG Ting-yun,PANG Fu-fei,LIU Lin

Key Laboratory of Specialty Fiber Optics and Optical Access Networks, Shanghai University, Shanghai 200072, China

Received:2011-12-16 Online:2012-02-29 Published:2012-02-29

摘要/Abstract

摘要： 基于光纤渐逝波原理，结合表面增强拉曼散射（surface-enhanced Raman scattering,SERS）技术，实验研究一种银溶胶涂覆的2×2熔锥光纤的SERS特性.熔锥光纤由一对单模光纤经过熔融拉制而成，固化在其表面的银溶胶为表面活性基底，起拉曼增强作用.随着锥区长度的增加，纤芯逐渐减小，其对光的束缚能力变弱，从而透射出较强的可作为拉曼激发光源的渐逝波.实验中，以R6G为待测溶液，在耦合锥区探测到低浓度目标分子R6G的拉曼光谱，其最低检测浓度达到了10^-8 mol/L.

关键词: 2×, 2熔锥光纤, R6G, 表面活性基底, 表面增强拉曼散射, 渐逝波

Abstract: Based on the optical fiber evanescent-wave excitation and surface-enhanced Raman scattering (SERS), we have carried out experimental studies on SERS characteristics of the 2×2 fused fiber coupler coated with Ag colloid particles. By stretching a pair of fused single-mode fibers with coating Ag colloid on its surface, the formed component can work as the surface-active substrate to perform Raman enhancement. With increase of the taper length, fiber core diameters decrease and less energy are bounded in the fiber. This enables stronger evanescent-wave to leak outward and become a Raman exciting source. In the experiments, the Raman spectra of R6G solutions has been detected at the coupling zone. The minimum detected concentration is 10^-8 mol/L.

Key words: 2×2 fused fiber, evanescent-wave, R6G, surface active-substrate, surface-enhanced Raman scattering (SERS)

中图分类号:

TN 253

陈振宜，陈娜，胡玲，王廷云，庞拂飞，刘琳. 2×2熔锥光纤表面增强拉曼散射实验[J]. 上海大学学报(自然科学版), 2012, 18(1): 7-11.

CHEN Zhen-yi,CHEN Na,HU Ling,WANG Ting-yun,PANG Fu-fei,LIU Lin. Experiment of 2×2 Fused Fiber Surface-Enhanced Raman Scattering[J]. Journal of Shanghai University（Natural Science Edition）, 2012, 18(1): 7-11.

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2×2熔锥光纤表面增强拉曼散射实验

Experiment of 2×2 Fused Fiber Surface-Enhanced Raman Scattering

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