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Frequency‐dependent finite‐difference time‐domain method based on iterated Crank–Nicolson scheme
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Frequency‐dependent finite‐difference time‐domain method based on iterated Crank–Nicolson scheme
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Journal Article
Frequency‐dependent finite‐difference time‐domain method based on iterated Crank–Nicolson scheme
2023
Overview
The finite‐difference time‐domain (FDTD) method based on the iterated Crank–Nicolson (ICN) scheme is extended to a frequency‐dependent version. The Drude model is used to express a metal dispersion, which is incorporated into the iterated Crank–Nicolson formulation with the trapezoidal recursive convolution technique. The validity of the present finite‐difference time‐domain method with convolutional perfectly matched layers is discussed through the analysis of a metal‐insulator‐metal plasmonic waveguide. Numerical results obtained from a two‐iteration technique are found to agree well with those from the traditional explicit finite‐difference time‐domain method.
The transmission spectra are calculated using the proposed FDTD method based on the iterated Crank‐ Nicolson scheme. The result obtained from the proposed method is in perfect agreement with that obtained from the traditional explicit FDTD method.
Publisher
John Wiley & Sons, Inc,Wiley
