Surface Plasmon Resonance Sensor Based on an Angled Optical Fiber

Author

Aoqun Jian ; Lili Deng ; Shengbo Sang ; Qianqian Duan ; Xuming Zhang ; Wendong Zhang

Author_Institution

MircoNano Syst. Res. Center, Taiyuan Univ. of Technol., Taiyuan, China

Volume

14

Issue

9

fYear

2014

fDate

Sept. 2014

Firstpage

3229

Lastpage

3235

Abstract

Optical fiber-based surface plasmon resonance (SPR) sensors show great promise in applications for biochemistry detection. In this paper, a SPR sensor employing the angled optical fiber tip with a constant incident angle is reported. The incident angle and light interaction have been theoretical analyzed. The sensing probe has been fabricated via polishing the fiber tip to a specific angle. The process to achieve the smooth polished surface is also presented. The SPR spectra of solutions with different refractive indexes are obtained by collecting the light reflected by the angled fiber with metal coating. There is a red shift with the increase of analytes´ refractive index. Slightly different from the theoretical value 8300 nm/RIU, the sensitivity obtained in the experiment is 7650 nm/RIU.

Keywords

biochemistry; fibre optic sensors; light reflection; optical fibre fabrication; optical films; polishing; red shift; refractive index measurement; surface plasmon resonance; RIU; SPR sensor; SPR spectra; angled optical fiber tip fabrication; biochemistry detection; constant incident angle; light interaction; light reflection; metal coating; red shift; refractive index sensor; sensing probe fabrication; smooth polished surface; surface plasmon resonance sensor; wavelength 7650 nm; Absorption; Optical fiber sensors; Optical fibers; Optical surface waves; Plasmons; Surface waves; Angled fiber; refractive index sensor; surface plasmon resonance;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2014.2322124

Filename

6810785