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

2011/09/20 by E. Cojocaru, Cojocaru, E.
Engineering · Physics and Astronomy · #Advanced Antenna and Metasurface Technologies #Electromagnetic Scattering and Analysis #FOS: Physical sciences #Microwave Engineering and Waveguides #Optics (physics.optics) #physics.optics

paper · pdf · doi:10.48550/arxiv.1109.4220

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

openalex publication_date 2011/09/20 · arxiv created 2011/09/22 · arxiv updated 2011/09/23 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28

Abstract

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.

Related

• Backward waves in a grounded bilayer slab containing double-negative (DNG) and double-positive (DPS) metamaterials
• Slab-induced propagating modes in waveguides composed of cutoff-regime singly negative metamaterials
• Finite-Difference and Pseudospectral Time-Domain Methods Applied to Backwards-Wave Metamaterials
• Study of the generation intensity in the backward wave oscillator with a ''grid'' diffraction grating as a function of the grating length
• Holding and amplifying electromagnetic waves with temporal non-Foster metastructures