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

Al-Qazwini, Yusser and Muhammad Noor, Ahmad Shukri and Yadav, T. K. and Yaacob, Mohd. Hanif and Harun, Sulaiman Wadi and Mahdi, Mohd Adzir (2014) Performance evaluation of a bilayer SPR-based fiber optic RI sensor with TiO2 using FDTD solutions. Photonic Sensors, 4 (4). pp. 289-294. ISSN 1674-9251; ESSN: 2190-7439

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Official URL: http://link.springer.com/article/10.1007/s13320-01...

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.

Item Type:Article
Keyword:Bilayer; Surface plasmon resonance (SPR); Fiber optic sensor; Refractive index (RI); Finite-difference time domain (FDTD)
Faculty or Institute:Faculty of Engineering
Publisher:SpringerOpen
DOI Number:10.1007/s13320-014-0207-y
Altmetrics:http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s13320-014-0207-y
ID Code:34875
Deposited By: Nurul Ainie Mokhtar
Deposited On:23 Dec 2015 14:45
Last Modified:23 Dec 2015 14:45

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