Surface-enhanced Raman Scattering sensor based on fused biconical taper fiber

Author

Liu, Lin ; Chen, Zhenyi ; Wang, Tingyun ; Pang, Fufei ; Chen, Na ; Li, Chenglin

Author_Institution

Key Laboratory of Special Fiber Optics and Optical Access Networks, Shanghai University, 149 Yanchang Road, 200072, China

Volume

2009-Supplement

fYear

2009

fDate

2-6 Nov. 2009

Firstpage

1

Lastpage

7

Abstract

In this paper a novel Surface-enhanced Raman Scattering (SERS) sensor combining with fused taper optical fiber (FBTF) and the film coating with silver sols is proposed. This structure is designed to obviously increase the SERS active surface when the radius is reduced and the length of the taper is increased, because the penetration depth is proportional to the taper length and inversely proportional to the taper radius according to the fiber-optic evanescent-wave theory. Based on the SERS sensing principle, the feasibility of FBTF sensor is analyzed in this paper. Actually, the Raman spectrum of R6G is obtained from the taper surface coating with the silver sols in our experiments. The detecting concentration is up to 10–7M. Moreover, this SERS sensing structure is simple and reproducible.

Keywords

Coatings; Optical fiber sensors; Optical fiber testing; Optical fibers; Optical sensors; Optical surface waves; Raman scattering; Sensor fusion; Silver; Surface waves; SERS-active surface; Surface-enhanced Raman Scattering (SERS); evanescent wave; fused biconical taper fiber; penetration depth;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications and Photonics Conference and Exhibition (ACP), 2009 Asia

Conference_Location

Shanghai, China

Print_ISBN

978-1-55752-877-3

Electronic_ISBN

978-1-55752-877-3

Type

conf

Filename

5405614