Graphene-coated resonators with frequency-selective super-scattering and super-cloaking

Abstract

Comb-like behavior of the multilayered graphene wrapped nanotubes in multiple scattering channels is investigated and utilized to design a structure for simultaneous super-scattering and super-cloaking. The underlying physics of the proposed structure is studied quantitatively by geometric interpretation through the associated planar structure based on the Bohr model and Foster's theorem. We observed that due to the presence of multiple dispersion bands in the planar counterpart, each cylindrical scattering Mie coefficient fulfills the resonance and invisibility conditions multiple times, depending on the selected number of layers. By refining the material and geometric parameters for the specified number of layers, resonances and zeros of the first two scattering terms are coincided simultaneously to observe super-scattering and super-cloaking, respectively. The proposed structure has lots of degrees of freedom to control the response in the operating frequency.

Dual polarized engineering the extinction cross-section of a dielectric wire using graphene-based oligomers

“…The main drawbacks of this method are its extreme sensitivity to the fabrication tolerance and material losses due to its highly resonant behavior. Therefore, very limited realizations of them are available in the low-frequency window 11 . Our proposed device performs more robustly considering these two aspects, as will be further clarified by the parametric analysis of the performance.…”

“…As another application, double graphene shells around the dielectric cylinders are used to design single and double band super-scatters 9 , 10 . By attaining multiple peaks and dips in the scattering response using multiple plasmonic layers, an optical device for simultaneous super-scattering and super-cloaking is proposed 11 . Moreover, flatten conformal hyperbolic metamaterials are presented using graphene strips around a cylinder under magnetic bias 12 .…”

Dyadic Green’s Function for Multilayered Planar, Cylindrical, and Spherical Structures with Impedance Boundary Condition

“…Also, as mentioned earlier, the dyadic Green's function of the graphene-based multilayered cylindrical structures will not be considered here. For calculating the scattering cross-section of graphene-based multilayer cylindrical structures, a simple approach based on the transfer matrix method (TMM) is proposed that will be suitable for establishing novel optical devices [68,69].…”

Dispersion properties of plasmonic sub-wavelength elliptical wires wrapped with graphene

“…In the framework of electromagnetic scattering by sub-wavelength graphene particles, an extensive wealth of theoretical analysis have been developed, allowing possible a wide range of applications based on the interaction between graphene and electromagnetic radiation via LSP mechanisms, including sensing [22,23], superscattering [24,25], low energy spasers [26,27,28,30], PT-symmetric structures tailoring lasing modes [29,30], and micro and nano antennas [31,32,33,34].…”