Finite difference time domain methods to solve problems in light scattering and propagation: new developments and extensions

摘要

The finite difference time domain (FDTD) method was developed nearly 50 years ago, but is still a subject of active research. Here we introduce a high-accuracy version of FDTD derived from a nonstandard finite difference model to solve the scattering problem. To handle metals in the visible light region, where the real part of the electrical permittivity is negative, FDTD must be modified to include dispersion. We introduce an extension and adaptation of the recursion convolution (RC) algorithm that reduces computational cost and improves accuracy.