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