Extraordinary transmission and other interesting related phenomena for 1-D periodic arrays
of slits (compound diffraction gratings) have recently been the object of intense research in …

In this paper we report directivity enhancement by a short-focal-length plano-concave lens
engineered by stacked subwavelength hole arrays (fishnet-like stack) with an effective …

Metamaterials and metastructures with effective relative permittivity near zero exhibit
unusual wave properties such as uniform phase distributions across such domains. Here we …

Metallic compound gratings are studied in this work by means of an analytical equivalent
circuit approach in order to obtain its transmission and reflection properties when illuminated …

We demonstrate a multiband plasmonic absorber based on transverse phase resonances.
We show that the modification of conventional metallic surfaces of T-shape grooves can …

We propose a compound metallic grating with perpendicular bumps in each slit and
investigate its transmission property theoretically. As the bumps are set symmetrically in the …

This paper proposes an equivalent circuit model that uses lumped elements and
transmission lines to explain the transmission of electromagnetic waves through a …

We study theoretically and numerically the occurrence of Fano resonances in a metagrating
made of slits with some symmetry breaking resulting in a dual period. At low frequency, a …

Doubled-sided grating structures including two identical single-layered metal gratings
separated by a dielectric layer exhibit enhanced optical transmission in the visible region for …

Based on the finite-difference time-domain method, we investigate the transmission
resonances of compound metallic gratings with two subwavelength slits filled with different …