We theoretically study fishnet metamaterials at optical frequencies. In contrast with earlier
works, we provide a microscopic description by tracking the transversal and longitudinal …

An active negative index metamaterial that derives its gain from an electron beam is
introduced. The metamaterial consists of a stack of equidistant parallel metal plates …

Many frequency-selective surface (FSS) structures are based on the use of a single periodic
array of slot/apertures in a conducting sheet embedded in a layered medium. However, it is …

Due to the wide range of applications of metal/graphene-based plasmonic metasurfaces
(sensors, absorbers, polarizers), it has become essential to provide an analytical method for …

Metallic plates with a two-dimensional (2D) periodic distribution of sub-wavelength
apertures are known to exhibit extraordinary transmission of electromagnetic waves …

The progress in the technology of manufacturing new materials increases the usage of
Terahertz (THz) region, which is considered as the last explored region of electromagnetic …

In this paper, we theoretically analyze and design a dual-narrowband terahertz (THz)
absorber based on a hole array drilled into a metallic slab. A very high-quality factor (Q) is …

A wideband equivalent circuit is proposed for the accurate analysis of scattering from a set of
stacked slit gratings illuminated by a plane wave with transverse magnetic or electric …

An equivalent circuit for the double-fishnet metamaterial is proposed. All lumped elements
are inferred from the interpretation of the electric and magnetic fields as well as the surface …

We report on angle-resolved time domain spectroscopy (TDS) carried out on a prismlike
negative index metamaterial operating around 0.5 THz. The wedge-type devices are …