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An invisibility cloak that can hide an arbitrary object external to the cloakitself has not been devised before. In this Letter, we introduce a novel way todesign a remote cloaking device that makes any object located at a certaindistance invisible. This is accomplished using multi-folded transformationoptics to remotely generate a hidden region around the object that no field canpenetrate and that does not disturb the far-field scattering electromagneticfield. As a result, any object in the hidden region can stay in position ormove freely within that region and remain invisible. Our idea is furtherextended in order to design a remote illusion optics that can transform anyarbitrary object into another one. Unlike other cloaking methods, this methodwould require no knowledge of the details of the object itself. The proposedmulti-folded transformation optics will be crucial in the design of remotedevices in a variety of contexts.

Concealing arbitrary objects remotely with multi-folded transformation optics