Concealing arbitrary objects remotely with multi-folded transformation optics

TL;DR

This paper introduces a novel remote cloaking method using multi-folded transformation optics, enabling invisibility of arbitrary objects at a distance without prior object knowledge, with potential applications in remote device design.

Contribution

The paper presents a new remote cloaking technique that does not require object-specific information, expanding the capabilities of transformation optics for invisibility and illusion effects.

Findings

Successfully cloaks objects at a distance without prior knowledge

Remains invisible while objects move freely within the hidden region

Extends to remote illusion optics transforming objects into others

Abstract

An invisibility cloak that can hide an arbitrary object external to the cloak itself has not been devised before. In this Letter, we introduce a novel way to design a remote cloaking device that makes any object located at a certain distance invisible. This is accomplished using multi-folded transformation optics to remotely generate a hidden region around the object that no field can penetrate and that does not disturb the far-field scattering electromagnetic field. As a result, any object in the hidden region can stay in position or move freely within that region and remain invisible. Our idea is further extended in order to design a remote illusion optics that can transform any arbitrary object into another one. Unlike other cloaking methods, this method would require no knowledge of the details of the object itself. The proposed multi-folded transformation optics will be crucial in the design of remote devices in a variety of contexts.