Maria Kafesaki

TL;DR: The breakdown of linear scaling due to the free electron kinetic energy for frequencies above approximately 100 THz is found, above the linear scaling regime, the resonance frequency saturates, while the amplitude of the resonant permeability decreases, ultimately ceasing to reach negative value.

TL;DR: In this paper, the transmission properties of a lattice of split ring resonators for different electromagnetic (EM) field polarizations and propagation directions were investigated. And the authors found that the incident electric field E couples to the magnetic resonance of the SRR when the EM waves propagate perpendicular to SRR plane and the incident E is parallel to the gap-bearing sides of SRR. This is manifested by a dip in the transmission spectrum.

TL;DR: In this article, the authors address the question of what is a good conductor for metamaterials and plasmonics, and develop a figure-of-merit for conductors that allows for a straightforward classification of conducting materials according to the resulting dissipative loss in the metammaterial.

TL;DR: In this paper, the authors demonstrate experimentally and numerically that metamaterials based on bilayer cross wires give giant optical activity, circular dichroism, and negative refractive index.

TL;DR: In this article, a left-handed metamaterial design composed of pairs of short slabs connected with continuous wires, operating in the microwave frequency regime, was investigated, both theoretically and experimentally, and it was shown that this description can account for all the characteristics of its electromagnetic behavior, explaining also its superior performance.