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Tapered Fiber-Optic Based Surface Plasmon Resonance Sensor

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Abstract:

We propose a tapered fiber-optic based surface plasmon resonance (SPR) sensor. The plasmonic sensing is designed by coating the waist of tapered fiber-optic with gold. The transmission spectrum of SPR wavelength were investigated by 2D finite element method (FEM). The calculation shows that the dips of the resonance wavelength shift toward long wave direction with the thickness of gold film decreasing. And increasing the diameters of the waist core of tapered fiber-optic also makes the resonance wavelength shift long wave direction. Furthermore, changing the refractive index of the external samples from 1.333 to 1.343 with step of ~0.002, the SPR wavelength shifts linearly from 575.05nm to 472.5nm. Owing to its compact and simple configuration, it also provides a feasible program for the refractive index high sensitivity detection.Keywords: surface plasmon resonance (SPR); tapered fiber-optic sensor; surface plasma; finite element method (FEM); optical fiber sensor

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Periodical:

Applied Mechanics and Materials (Volumes 738-739)

Pages:

23-26

DOI:

https://doi.org/10.4028/www.scientific.net/AMM.738-739.23

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Online since:

March 2015

Authors:

Xiao Ming Wang, Chun Liu Zhao*, Run Guang Yang, Yan Ru Wang, Fei Fei Shi, Shang Zhong Jin

Keywords:

Finite Element Method (FEM), Optical Fiber Sensor, Surface Plasma, Surface Plasmon Resonance (SPR), Tapered Fiber-Optic Sensor

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© 2015 Trans Tech Publications Ltd. All Rights Reserved

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