Researchers from University of Extremadura have demonstrated the electromagnetic invisibility of objects using an alternative technique, based on filler cloaking. The novelty lies in achieving invisibility from the interior of the objects, without adding external layers. This approach brings numerous advantages and opens up new applications in optics, communications systems and bioengineering.
 
In recent years, invisibility has become an area of increasing research interest due to advances in materials engineering. This research work by the UEx, which has been published in Scientific Reports by the Nature Group, has explored the electromagnetic properties of specific materials which can make certain objects invisible when they are introduced into its interior, in the manner of fillers. Normally, artificial materials known as metamaterials, or materials with high dielectric or magnetic constants, are used.

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