Eurekalert November 26, 2018
Most of the techniques for cloaking harness the extraordinary properties of certain materials to make light circumvent the object to be made invisible. An international team of researchers (Spain, Italy) has developed a technique using the electromagnetic properties of specific materials which can make certain objects invisible when they are introduced as fillers. This plasmonic cloaking makes the object and the filler jointly invisible. The method makes it possible to achieve invisibility from the interior of an object without using any external device and allows the object to interact with its environment without being hampered by the external cloaking. The technique is valid for objects of small size, and the bandwidths achieved are still narrow, but the investigators believe the scope for further improvements is promising…read more. Open Access TECHNICAL ARTICLE
Interaction of light with a hollow sphere of silicon (A) and with the same sphere filled with a potion composed of three different strata (B). Credit: UEx