Scattering of electromagnetic waves from a graphene-coated thin cylinder of left-handed metamaterial

TL;DR

This study investigates how graphene-coated left-handed metamaterial cylinders scatter electromagnetic waves, revealing tunable resonance peaks and unique behaviors near zero permittivity, with potential applications in sensing and wave control.

Contribution

It demonstrates spectral tunability of resonance peaks via graphene's chemical potential in LHM cylinders, a novel insight into wave scattering in metamaterials.

Findings

Resonance peaks are tunable by changing graphene's chemical potential.

No invisibility condition is achievable in dielectric environments.

Unique scattering behavior occurs near zero permittivity.

Abstract

In this paper we explored the scattering behavior of thin cylinders made of LHM and coated by a monoatomic graphene layer. A spectral tunability of the resonance peaks is evidenced by altering the chemical potential of the graphene coating, a fact that occurs at any state of polarization of the incident plane wave in opposition to the case of scatterers of dielectric core. On the contrary, no invisibility condition can be satisfied for dielectric environments. A singular performance is also found for cylinders with permittivity and permeability near zero. Practical implementations of our results can be carried out in sensing and wave manipulation driven by metamaterials.