Open AccessDispersive contour-path finite-difference time-domain algorithm for modeling surface plasmon polaritons at flat interfaces
Author(s) -
Ahmad Mohammadi,
Mario Agio
Publication year - 2006
Publication title -
optics express
Language(s) - Uncategorized
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.14.011330
Subject(s) - finite difference time domain method , surface plasmon polariton , optics , surface plasmon , dielectric , boundary (topology) , finite difference method , plasmon , physics , materials science , mathematical analysis , mathematics , optoelectronics
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.