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Incident Wave Source for Finite-Difference Time-Domain Computation of Electromagnetic Scattering for Objects Embedded in Layered Dispersive Media

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Abstract

An incident wave source for finite-difference time-domain (FDTD) computation of electromagnetic scattering involving layered dispersive media is described. The method is based on the decomposition of an arbitrary incident wave into its frequency components and computing the corresponding steady-state fields in the FDTD lattice analytically. The wave source can in principle generate an incident wave obeying the dispersion relations and reflection and transmission relations of the FDTD lattice exactly. Numerical results show that, in practical computation, the accuracy of the generated incident wave is limited by FFT aliasing error occurring during waveform synthesis.

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Authors and Affiliations

  1. Department of Manufacturing Engineering, Boston University, 15 St. Mary's Street, Boston, Massachusetts, 02215

    Michael S. Yeung

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  1. Michael S. Yeung
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Yeung, M.S. Incident Wave Source for Finite-Difference Time-Domain Computation of Electromagnetic Scattering for Objects Embedded in Layered Dispersive Media. Journal of Scientific Computing 14, 121–145 (1999). https://doi.org/10.1023/A:1023278902960

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  • DOI: https://doi.org/10.1023/A:1023278902960