Dielectric Optical Cloak

TL;DR

This paper reports the first experimental realization of a broadband, low-loss dielectric optical cloak at near-infrared wavelengths, demonstrating invisibility using isotropic dielectric materials and quasi-conformal mapping.

Contribution

It introduces a novel dielectric cloaking device designed with quasi-conformal mapping, achieving broadband invisibility at optical frequencies.

Findings

Successful experimental demonstration of dielectric cloaking.

Broadband invisibility achieved from 1400-1800 nm.

Uses only isotropic dielectric materials for low-loss performance.

Abstract

Invisibility or cloaking has captured human's imagination for many years. With the recent advancement of metamaterials, several theoretical proposals show cloaking of objects is possible, however, so far there is a lack of an experimental demonstration at optical frequencies. Here, we report the first experimental realization of a dielectric optical cloak. The cloak is designed using quasi-conformal mapping to conceal an object that is placed under a curved reflecting surface which imitates the reflection of a flat surface. Our cloak consists only of isotropic dielectric materials which enables broadband and low-loss invisibility at a wavelength range of 1400-1800 nm.