Photonic Sensors, 2014, 4 (4): 289–294, 网络出版: 2014-12-08   

Performance Evaluation of a Bilayer SPR-Based Fiber Optic

Performance Evaluation of a Bilayer SPR-Based Fiber Optic RI Sensor With TiO2 Using FDTD Solutions
作者单位
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
摘要
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.

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[J]. Photonic Sensors, 2014, 4(4): 289–294. 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.

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