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


Citation

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

Abstract / Synopsis

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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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1007/s13320-014-0207-y
Publisher: SpringerOpen
Keywords: Bilayer; Surface plasmon resonance (SPR); Fiber optic sensor; Refractive index (RI); Finite-difference time domain (FDTD)
Depositing User: Nurul Ainie Mokhtar
Date Deposited: 23 Dec 2015 06:45
Last Modified: 23 Dec 2015 06:45
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1007/s13320-014-0207-y
URI: http://psasir.upm.edu.my/id/eprint/34875
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