Animations obtained by the finite-difference time-domain method showing the backward wave propagation in double-negative single-layer waveguides

Details Animations obtained by the finite-difference time-domain method showing the backward wave propagation in double-negative single-layer waveguides Animations obtained by the finite-difference time-domain method showing the backward wave propagation in double-negative single-layer waveguides

2011-09-20

arxiv.org/abs/1109.4220v2

Physics

Optics

HTML(text) +10 figures, (png,jpeg, and gif files)

Scientific paper

The materials having negative permittivity and negative permeability, which are labeled as double-negative (DNG) materials, have attracted much attention because of their unusual physical properties, which are different from those of conventional double-positive (DPS) materials. Animations obtained by the finite-difference time-domain method (FDTD) are provided showing how a transient sinusoidal signal that starts at t=0 propagates in the DPS and DNG waveguides. Three types of waveguides are considered: a slab or grounded slab inside the cladding medium and a parallel-plate waveguide filled with the slab. Dispersion curves in terms of normalized parameters are also provided.

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