Effective tunability and realistic estimates of group index in plasmonic metamaterials exhibiting electromagnetically induced transparency

Abstract

We study the phenomenon of the electromagnetically induced transparency in planar and stacked plasmonic metamaterials (MMs) using the finite integration time domain and finite element methods. For such structures, the dependence of the tunability of the inherent structural resonances on geometry design is clarified. We also analyze the performance of recently demonstrated MM designs in terms of the achievable group refractive index and losses, which are of great interest for slowing light applications.

Fano resonance in novel plasmonic nanostructures

“…In addition to extensional studies on the theoretical physics behind FR generation , a large number of papers have recently investigated how geometrical symmetry breaking can lead to FR observation in the optical spectra. A common feature shared by these investigations is the overlap of a discrete state with a continuum state accompanied by close energy positions of the destructive and constructive interferences.…”

“…One important factor in the above‐mentioned studies is the scaling of nanostructures exhibiting FR . Most of the experimentally realized plasmonic structures have a characteristic scale of 100 nm and beyond . It has a deep physical reason based on the Mie theory, which has been discussed in less detail.…”

A Comprehensive Review of Metasurface Structures Suitable for RF Energy Harvesting

“…Recently, metamaterials/metasurfaces have attracted an extraordinary consideration because of their excellent properties that are not found in nature. Metamaterials are novel manufactured materials that are made out of periodic subwavelength metal/dielectric structures that can be developed to achieve a strong coupling to both ingredients of incident EM fields (electric and magnetic) [4], [37]- [42]. The unique properties of metamaterials such as negative permittivity, negative permeability, and refractive index make it more attractive to use in EM applications at frequencies ranging from low microwave to optical including cloaking [43], [44], perfect absorber [45]- [51] and RF EH systems [52]- [64].…”