A General Class of Metamaterial Transformation Slabs

TL;DR

This paper introduces a broad class of transparent metamaterial slabs using transformation optics, demonstrating their potential for novel optical devices like radomes and cloaking without requiring negative-index materials.

Contribution

It develops a general framework for metamaterial slabs with unique imaging capabilities, extending previous designs and enabling practical applications without negative or resonant media.

Findings

Designs for perfect radomes and anti-cloaking devices demonstrated

Metamaterials can achieve anomalous optical features without negative index

Numerical studies confirm the effectiveness of the proposed slabs

Abstract

In this paper, we apply transformation-based optics to the derivation of a general class of transparent metamaterial slabs. By means of analytical and numerical full-wave studies, we explore their image displacement/formation capabilities, and establish intriguing connections with configurations already known in the literature. Starting from these revisitations, we develop a number of nontrivial extensions, and illustrate their possible applications to the design of perfect radomes, anti-cloaking devices, and focusing devices based on double-positive (possibly nonmagnetic) media. These designs show that such anomalous features may be achieved without necessarily relying on negative-index or strongly resonant metamaterials, suggesting more practical venues for the realization of these devices.