A Novel Design of Dielectric Perfect Invisibility Devices

TL;DR

This paper introduces a new dielectric invisibility device design using negative refraction and conformal mapping, potentially achieving perfect invisibility with zero time delay and minimal reflection.

Contribution

It presents a novel design for dielectric invisibility media that relaxes previous constraints and suggests the possibility of perfect invisibility with isotropic materials.

Findings

Zero time delay in the proposed design

Reflection close to zero due to impedance matching

Potential for perfect invisibility with isotropic materials

Abstract

The aim of an invisibility device is to guide light around any object put inside, being able to hide objects from sight. In this work, we propose a novel design of dielectric invisibility media based on negative refraction and optical conformal mapping that seems to create perfect invisibility. This design has some advantages and more relaxed constraints compared with already proposed schemes. In particular, it represents an example where the time delay in a dielectric invisibility device is zero. Furthermore, due to impedance matching of negatively refracting materials, the reflection should be close to zero. These findings strongly indicate that perfect invisibility with optically isotropic materials is possible. Finally, the area of the invisible space is also discussed.