Dispersive contour-path algorithm for the two-dimensional finite-difference time-domain method.
We have extended the contour-path effective-permittivity (CP-EP) finite-difference time-domain (FDTD) algorithm by A. Mohammadi, et al., Opt. Express 13, 10367 (2005), to linear dispersive materials using the Z-transform formalism. We test our method against staircasing and the exact solution for plasmon spectra of metal nanoparticles. We show that the dispersive contour-path (DCP) approach yields better results than staircasing, especially for the cancellation of spurious resonances.
Mohammadi
Ahmad
A
Department of Physics, Persian Gulf University, 75196 Bushehr, Iran.
Jalali
Tahmineh
T
Agio
Mario
M
D000465:Algorithms; D003198:Computer Simulation; D004574:Electromagnetic Fields; D053768:Metal Nanoparticles / Q000737:chemistry*; D015233:Models, Statistical; D008962:Models, Theoretical; D053758:Nanoparticles; D049329:Nanostructures; D055095:Optics and Photonics; D015203:Reproducibility of Results; D013499:Surface Properties; D013997:Time Factors