Dispersive Contour-Path Algorithm for the TRC-FDTD Method

We introduce the dispersive contour-path (DCP) algorithm to the FDTD method based on the trapezoidal recursive convolution (TRC) technique. The scattering efficiency is evaluated in the analysis of a metallic nanocylinder. It is found that the DCP-FDTD method yields faster convergence in the calculation of the scattering efficiency, when compared to the standard FDTD method with a staircase approximation. The memory usage of the TRC-DCP-FDTD method is reduced in comparison with that of the Z-transform FDTD method.