In this overview paper the trends in the modern literature concerning the characterization of
linear electromagnetic properties of nanostructured metamaterials are briefly discussed …

Electromagnetic (EM) metamaterials have become a field of intense research activities. This
paper presents a critical perspective of the field, with emphasis on fundamental concepts …

The essence of the metamaterial concept from the structural point of view. Particular
attention is paid to the macroscopic description of metamaterials and to the corresponding …

The emergence of planar metamaterials (PrMMs) has opened a gateway to unprecedented
electromagnetic (EM) properties and functionality unattainable from naturally occurring …

We study experimentally and theoretically coupling mechanisms between metamaterial
elements of the split ring resonator (SRR) type. We show that, depending on the orientation …

A planar slab of negative-index material works as a superlens with sub-diffraction-limited
resolution, as propagating waves are focused and, moreover, evanescent waves are …

We investigate the use of nonlinear metasurfaces formed by plasmonic nanoantennas
loaded with χ (3) nonlinear elements, in order to realize subwavelength imaging based on …

We describe the design of near-field focusing plates, which are grating-like structures that
can focus electromagnetic radiation to spots or lines of arbitrarily small subwavelength …

Focusing using conventional lenses relies on the collection and interference of propagating
waves, but discounts the evanescent waves that decay rapidly from the source. Since these …

Although negative-refractive-index metamaterials have successfully achieved
subwavelength focusing, image resolution is limited by the presence of losses. In this Letter …