Tunable invisibility cloaking by using graphene-coated nanowires

TL;DR

This paper presents a theoretical and numerical study of tunable invisibility cloaking using graphene-coated nanowires, enabling control over scattering and resonance in the THz frequency range.

Contribution

It introduces an analytical formula for spectral window evaluation and demonstrates tunable cloaking via graphene chemical potential adjustment.

Findings

Significant reduction in scattering efficiency for thin cylinders.

Tunable resonant invisibility achieved through gate voltage control.

Multi-frequency cloaking mechanism demonstrated with dimer coated nanowires.

Abstract

We investigate, both theoretically and numerically, a graphene-coated nano-cylinder illuminated by a plane electromagnetic wave in THz range of frequencies. We have derived an analytical formula that enables fast evaluation of the spectral window with a substantial reduction in scattering efficiency for sufficiently thin cylinder. This effect leads to tunable resonant invisibility that can be achieved via modification of graphene chemical potential monitored by the gate voltage. A multi-frequency cloaking mechanism based on dimer coated nanowires is also discussed.