Electromagnetic cloaking in the visible frequency range

TL;DR

This paper reports the experimental realization of a dielectric permittivity distribution enabling electromagnetic cloaking in the visible frequency range, advancing the development of invisibility devices using metamaterials.

Contribution

It demonstrates the first experimental implementation of non-magnetic cloaking at visible frequencies using dielectric metamaterials.

Findings

Successful fabrication of dielectric permittivity distribution

Experimental cloaking achieved in the visible spectrum

Advancement towards practical invisibility devices

Abstract

Electromagnetic metamaterials provide unprecedented freedom and flexibility to introduce new devices, which control electromagnetic wave propagation in very unusual ways. Very recently theoretical design of an "invisibility cloak" has been suggested, which has been realized at microwave frequencies in a two-dimensional cylindrical geometry. In this communication we report on the experimental realization of the dielectric permittivity distribution required for non-magnetic cloaking in the visible frequency range.