Nonmagnetic invisibility cloak with minimized scattering cross section

TL;DR

This paper introduces a new nonmagnetic invisibility cloak design using generalized transformation functions, optimized for minimal scattering, and demonstrates its effectiveness through simulations and practical layered material implementation.

Contribution

It presents a novel transformation-based design for nonmagnetic cloaks with minimized scattering, including impedance matching and practical layered material realization.

Findings

Reduced scattering cross section demonstrated in simulations

Effective media approach enables practical cloak fabrication

Impedance matching improves cloak performance

Abstract

We propose one kind of transformation functions for nonmagnetic invisibility cloak with minimized scattering on the basis of generalized transformation. By matching the impedance at the outer surface of the cloak, the transformations with two parameters are determined. To confirm the performance of the cloak, full wave simulation based on the finite element method is carried out. Furthermore, total scattering cross section is computed to better illustrate the scattering characteristics of cloak with different parameters. In addition, based on the effective media theory, alternating layered system composed of two isotropic materials is employed to realize the cloak practically.