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

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

作者机构：Research Centre of Excellence for Wireless and Photonics Networks (WiPNET) Faculty of Engineering UniversitiPutra Malaysia 43400 UPM Serdang Selangor Malaysia Department of Computer and Communication Systems Engineering Faculty of Engineering Universiti Putra Malaysia43400 UPM Serdang Selangor Malaysia Department of Electrical Engineering Faculty of Engineering University of Malaya 50603 Kuala Lumpur Malaysia 

出 版 物：《Photonic Sensors》 (光子传感器（英文版）)

年 卷 期：2014年第4卷第4期

页      面：289-294页

核心收录：

学科分类：081702[工学-化学工艺] 0808[工学-电气工程] 070207[理学-光学] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 08[工学] 0817[工学-化学工程与技术] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 

基　　金：Ministry of Higher Education, Malaysia Universiti Putra Malaysia 

主　　题：Bilayer surface plasmon resonance (SPR) fiber optic sensor refractive index (RI) finite-differencetime domain (FDTD) 

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.