Electronic engineers at the University of Pennsylvania in Philadelphia are researching a device they say could make objects ”nearly invisible to an observer.” The contrivance works by preventing light from bouncing off the surface of an object, causing the object to appear so small it all but disappears.
The concept is based on a ”plasmonic cover,” which is a means to prevent light from scattering. (It is light bouncing off an object that makes it visible to an observer).
The cover would stop light from scattering by resonating at the same frequency as the light striking it. If such a device could cope with different wavelengths of electromagnetic radiation (including visible light), in theory, the object would vanish into thin air.