Ground-Plane Quasi-Cloaking for Free Space

TL;DR

This paper introduces simplified ground-plane cloaks using all-dielectric materials that effectively reduce electromagnetic scattering in free space, offering broadband cloaking solutions that are easier to demonstrate experimentally.

Contribution

It presents novel simplified ground-plane cloaks made from a few dielectric blocks, capable of broadband cloaking in free space and from specific directions, simplifying experimental realization.

Findings

Simplified dielectric cloaks significantly reduce scattering.

Broadband cloaking performance achieved with minimal material complexity.

Directional cloaking in free space demonstrated.

Abstract

Ground-plane cloak designs are presented, which minimize scattering of electromagnetic radiation from metallic objects in the visible spectrum. It is showed that simplified ground-plane cloaks made from only a few blocks of all-dielectric isotropic materials, either embedded in a background medium or in free space, can provide considerable cloaking performance while maintaining their broadband nature. A design which operates isolated in free space that cloaks radiation originating from a specified direction is also analyzed. These schemes should be much easier to be demonstrated experimentally compared to full designs.