Performance evaluation of a bilayer SPR-based fiber optic RI sensor with TiO2 using FDTD solutions

被引：12

作者：

Al-Qazwini Y. ^{[1
]}

Noor A.S.M. ^{[1
,2
]}

Yadav T.K. ^{[1
]}

Yaacob M.H. ^{[1
,2
]}

Harun S.W. ^{[3
]}

Mahdi M.A. ^{[1
,2
]}

机构：

[1] Research Centre of Excellence for Wireless and Photonics Networks (WiPNET), Universiti Putra Malaysia, UPM Serdang, Selangor

[2] Department of Computer and Communication Systems Engineering, Universiti Putra Malaysia, UPM Serdang, Selangor

[3] Department of Electrical Engineering, University of Malaya, Kuala Lumpur

来源：

Photonic Sensors | 2014年 / 4卷 / 04期

关键词：

Bilayer; fiber optic sensor; finite-difference time domain (FDTD); refractive index (RI); surface plasmon resonance (SPR);

D O I：

10.1007/s13320-014-0207-y

中图分类号：

学科分类号：

摘要：

We proposed a new bilayer surface plasmon resonance-based fiber-optic refractive index sensor with silver and an over-layer of TiO2. We numerically investigated the optimal thickness of TiO2 over-layer in the proposed sensor and compared its performance to that based on typical bimetallic layers of silver-and-gold in the aqueous media using finite-difference time domain approach. We show that the use of TiO2 over-layer greatly improves the sensor performance in terms of sensitivity and signal-to-noise ratio compared to that with gold as the over-layer. Not only does the TiO2 over-layer offer a cost-effective alternative to gold for overcoming the oxidation problem, but also it allows resonance wavelength-tunability. © 2014, The Author(s).

引用

页码：289 / 294

页数：5

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