Performance Evaluation of a Bilayer SPR-Based Fiber Optic RI Sensor With TiO<sub>2</sub> Using FDTD Solutions

Yusser AL-QAZWINI; A. S. M. NOOR; T. K. YADAV; M. H. YAACOB; S. W. HARUN; M. A. MAHDI

doi:doi:10.1007/s13320-014-0207-y

Photonic Sensors, 2014, 4 (4): 289–294, Published Online: Dec. 8, 2014

Performance Evaluation of a Bilayer SPR-Based Fiber Optic RI Sensor With TiO₂ Using FDTD Solutions

论文大纲

Yusser AL-QAZWINI ¹A. S. M. NOOR ^1,2,*T. K. YADAV ¹M. H. YAACOB ^1,2S. W. HARUN ³M. A. MAHDI ^1,2

Author Affiliations

¹ Research Centre of Excellence for Wireless and Photonics Networks (WiPNET), Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

² Department of Computer and Communication Systems Engineering, Faculty of Engineering, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia

³ Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia

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

Abstract

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.

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Yusser AL-QAZWINI, A. S. M. NOOR, T. K. YADAV, M. H. YAACOB, S. W. HARUN, M. A. MAHDI. Performance Evaluation of a Bilayer SPR-Based Fiber Optic RI Sensor With TiO₂ Using FDTD Solutions[J]. Photonic Sensors, 2014, 4(4): 289–294.

Performance Evaluation of a Bilayer SPR-Based Fiber Optic RI Sensor With TiO₂ Using FDTD Solutions

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