Abstract
A fully implicit finite-difference time-domain (FDTD) scheme with second-order space-time accuracy for Maxwell’s equations in a Cole–Cole dispersive medium is proposed and analyzed. The temporal discretization is built upon Crank-Nicolson method, and the Caputo derivative term is based on the recently established \(\mathcal {L}2\text {-}1_{\sigma }\) formula and a weighted approach. A rigorous analysis is carried out to show that the proposed scheme is unconditionally stable and has second-order accuracy in both time and space. 2D and 3D numerical examples are presented to validate our theoretical findings.









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Acknowledgements
The authors would like to thank the editor and reviewers for their constructive comments and suggestions, which helped the authors to improve the quality of the paper significantly. The authors are very grateful to Dr. Jian Huang of Xiangtan University for his assistance in improve the quality of the paper. This work is supported by the National Natural Science Foundation of China Grant No. 12131014.
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XB: Conceptualization, Formal analysis, Methodology, Software, Writing-original draft. HR: Conceptualization, Funding acquisition, Investigation, Methodology, Supervision, Roles/Writing.
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Bai, X., Rui, H. A second-order space-time accurate scheme for Maxwell’s equations in a Cole–Cole dispersive medium. Engineering with Computers 38, 5153–5172 (2022). https://doi.org/10.1007/s00366-021-01585-3
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DOI: https://doi.org/10.1007/s00366-021-01585-3