Dispersive contour-path finite-difference time-domain algorithm for modelling surface plasmon polaritons at flat interfaces, By Ahmad Mohammadi

Research

Title	Dispersive contour-path finite-difference time-domain algorithm for modelling surface plasmon polaritons at flat interfaces
Type	Article
Keywords	—
Journal	OPTICS EXPRESS
DOI	—
Researchers	Ahmad Mohammadi (First researcher) ,

Abstract

We investigate the accuracy of the two-dimensional Finite- Difference Time-Domain (FDTD) method in modelling Surface Plasmon Polaritons (SPPs) in the case of a single metal-dielectric interface and of a thin metal film showing that FDTD has difficulties in the low-group-velocity region of the SPP. We combine a contour-path approach with Z transform to handle both the electromagnetic boundary conditions at the interface and the negative dispersive dielectric function of the metal. The relative error is thus significantly reduced.