A novel EM concentrator with open-concentrator region based on multi-folded transformation optics

TL;DR

This paper introduces a new electromagnetic concentrator design using multi-folded transformation optics, enabling an open region for EM waves, which simplifies fabrication and offers new control functionalities.

Contribution

It presents a homogeneous-material EM concentrator with an open region, a novel design that differs from traditional inhomogeneous, fully enclosed concentrators.

Findings

Design successfully creates open concentrator regions

Enables simultaneous rotation and storage of EM waves

Simplifies fabrication with homogeneous materials

Abstract

Conventional concentrators with inhomogeneous coating materials that fully enclose the destined region pose great challenges for fabrication. In this paper, we propose to design an EM concentrator with homogeneous materials. Distinguished from conventional ones, the elaborately designed EM concentrator features a concentrator region that is open to the outer-world, which is achieved with multi-folded transformation optics method by compressing and folding the coating materials to create window(s). Based on this concept, we also investigate open-rotator and open rotational-concentrator devices, which could simultaneously rotate and store the EM waves in the central destined region. Due to the open nature of our proposed designs, we believe they will find potential applications in remote controlling with impressive new functionalities.