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Maxwell’s wave equation is solved analytically in a general medium designed by transformation optics theory with a general form of transformation function on radial coordinate in a cylindrical polar coordinate system. Some well-known examples such as interior invisibility cloak, concentrator and external cloak are solved according to this approach. We particularly concentrate on the external invisibility...
Based on transformation optics and folded geometry, a twin cloak at a distance is designed and its optical properties are derived and analyzed. In order to hide an object, a proper antiobject is needed for each object to put in the structure of the external cloak. The illusory properties of this twin external cloak is also discussed, so the cloak can hide one (or more) object(s) from the observer’s...
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