  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.
