Surface plasmon resonance sensor based on multihole optical fiber with TiO2 layer

Di Gao; Chunying Guan; Yaowu Wen; Hailong Wu; Libo Yuan

doi:10.1117/12.999488

30 November 2012 Surface plasmon resonance sensor based on multihole optical fiber with TiO₂ layer

Di Gao, Chunying Guan, Yaowu Wen, Hailong Wu, Libo Yuan

Proceedings Volume 8561, Advanced Sensor Systems and Applications V; 856110 (2012) https://doi.org/10.1117/12.999488
Event: Photonics Asia, 2012, Beijing, China

Abstract

A novel surface plasmon resonance (SPR) sensor based on the multihole optical fiber with TiO₂ layer is proposed and numerically characterized. The finite element method(FEM) is used to analyze the characteristics of the SPR sensor. The effects of the pitch between air holes, the thicknesses of the gold film and titanium dioxide layer on the sensor characteristics are investigated, and the sensitivity of proposed sensor is also given. The results indicate that when the thickness of gold film increases, the resonance wavelength shifts to longer wavelength, and the resonance peak broadens. The spectral tuning of the plasmon resonance can be more efficiently realized by changing the TiO₂ layer thickness. The maximal refractive-index resolution of the proposed sensor for aqueous analytes is 5×10^-5.

Citation Download Citation

Di Gao, Chunying Guan, Yaowu Wen, Hailong Wu, and Libo Yuan "Surface plasmon resonance sensor based on multihole optical fiber with TiO₂ layer", Proc. SPIE 8561, Advanced Sensor Systems and Applications V, 856110 (30 November 2012); https://doi.org/10.1117/12.999488

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KEYWORDS

Sensors

Titanium dioxide

Optical fibers

Gold

Refractive index

Silica

Surface plasmons

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