Researchers at the Public University of Navarra and the Polytechnic University of Valencia have created an “invisibility cloak” capable of hiding objects in fuzzy environments.
These researchers from the Public University of Navarra (UPNA) and the Polytechnic University of Valencia (UPV) have managed to create an invisibility cloak that can conceal objects in diffuse environments, regardless of the type of lighting in these environments.
According to a UPNA statement, this investigation lays the groundwork for making an airplane undetectable between fog or even a submarine at sea. Following this study, published in the journal Physical Review A., researchers are now working on the lab building of that invisibility cloak they simulated.
The so-called diffuse environments are those in which light does not propagate in a straight line, for example as a foggy day, murky water, a place with fumes or organic tissue of the human body. The idea of being able to make an object invisible with special material capable of deflecting light was proposed about a decade ago and scientists have since proven that making this type of device is actually very difficult.
“It has recently been shown that this difficulty disappears if the object to be concealed is in a diffuse environment”, since in this case it is possible to construct, in a relatively simple way, “macroscopic invisibility cloaks, which work in any direction of light and a large bandwidth”, said researcher Alejandro Martínez Abiétar, from the Center for Nanophotonic Technology.
So far, he added that the invisibility cloaks do not work properly when the object is illuminated with short-term light sources, so the proposal of UPNA and UPV researchers “solves the problem using a different approach based on a technique Known as optics of transformation, that allows to know which material is more suitable to create the cover and to hide the object”.