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Open AccessConcept Paper
Sensors 2016, 16(4), 506; doi:10.3390/s16040506

Comprehensive Numerical Analysis of Finite Difference Time Domain Methods for Improving Optical Waveguide Sensor Accuracy

Department of Electrical, Electronic and Systems Engineering, Faculty of Engineering and Built Environment, University Kebangsaan Malaysia, 43600 UKM Bangi, Selangor, Malaysia
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Author to whom correspondence should be addressed.
Academic Editors: Teen-Hang Meen, Shoou-Jinn Chang, Stephen D. Prior and Artde Donald Kin Tak Lam
Received: 6 February 2016 / Revised: 8 March 2016 / Accepted: 18 March 2016 / Published: 9 April 2016
View Full-Text   |   Download PDF [1830 KB, uploaded 9 April 2016]   |  

Abstract

This paper discusses numerical analysis methods for different geometrical features that have limited interval values for typically used sensor wavelengths. Compared with existing Finite Difference Time Domain (FDTD) methods, the alternating direction implicit (ADI)-FDTD method reduces the number of sub-steps by a factor of two to three, which represents a 33% time savings in each single run. The local one-dimensional (LOD)-FDTD method has similar numerical equation properties, which should be calculated as in the previous method. Generally, a small number of arithmetic processes, which result in a shorter simulation time, are desired. The alternating direction implicit technique can be considered a significant step forward for improving the efficiency of unconditionally stable FDTD schemes. This comparative study shows that the local one-dimensional method had minimum relative error ranges of less than 40% for analytical frequencies above 42.85 GHz, and the same accuracy was generated by both methods. View Full-Text
Keywords: surface plasmon resonance SPR; FDTD methods; multi-dimensional FDTD; optical waveguide sensor OWS surface plasmon resonance SPR; FDTD methods; multi-dimensional FDTD; optical waveguide sensor OWS
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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MDPI and ACS Style

Samak, M.M.E.A.; Bakar, A.A.A.; Kashif, M.; Zan, M.S.D. Comprehensive Numerical Analysis of Finite Difference Time Domain Methods for Improving Optical Waveguide Sensor Accuracy. Sensors 2016, 16, 506.

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