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dielectric scattering 1fft acceleration 1large time steps 1multiscale metasurfaces 1time-domain integral equations 1

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physics.optics2026

Large-Time-Step Operation in a Volume Integral Equation for Dielectric Scattering

Sushil Kumar, Giampiero Gerini, M. C. van Beurden

The paper presents a method to use much larger time steps in a time‑domain volume integral equation solver for dielectric scattering, employing a matrix‑free FFT approach to accele…