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

Year: 2006

Authors: Mohammadi A., Agio M.

Autors Affiliation: Shiraz Univ, Dept Phys, Shiraz 71454, Iran; Swiss Fed Inst Technol, Nano Opt Grp, Lab Phys Chem, CH-8093 Zurich, Switzerland.

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.

Journal/Review: OPTICS EXPRESS

Volume: 14 (23)      Pages from: 11330  to: 11338

KeyWords: Effective Permittivities; Fdtd; Implementation
DOI: 10.1364/OE.14.011330

Citations: 21
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