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Dispersive contour-path algorithm for the two-dimensional finite-difference time-domain method
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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.
Researchers Ahmad Mohammadi (First researcher) , Tahmineh Jalali (Second researcher) ,