Cloaking laminate design based on GPT-vanishing structures

TL;DR

This paper introduces a lamination-based near-cloaking design using isotropic materials that cancels generalized polarization tensors, enhancing cloaking effectiveness while simplifying construction.

Contribution

It presents a novel cloaking laminate design that approximates GPT-vanishing structures, improving manufacturability and effectiveness over previous non-coated designs.

Findings

Achieves enhanced cloaking effect through GPT-vanishing structures.

Reduces contrast requirements in isotropic materials.

Simplifies manufacturing of cloaking laminates.

Abstract

We propose a near-cloaking design which is a lamination of a finite number of layers of isotropic materials. The proposed design is an approximation of a cloaking material obtained by pushing forward a multi-coated structure for which the coating cancels the generalized polarization tensors (GPTs) up to several leading orders. The enhanced cloaking effect achieved by the GPT-vanishing structure permits a coarser microscale requirement and reduces the contrast in the constituent isotropic materials, thereby improving constructibility of cloaking laminates compared with designs based on a non-coated structure.