Researchers at Berkley create invisibility cloak
The material, which doesn’t occur in nature, is made on a nano scale that measures in billionths of a meter. Previous forays worked on a microwave wavelength that we, feeble humans, cannot see. The newly produced material works on a wavelength closer to that used in the telecom industry, which is a bit closer to the visible spectrum. The Berkley team made two different sets of metamaterials; one made from nanometer-scale stacks of silver and magnesium fluoride arranged in a “fishnet” structure, while the other used silver nanowires.
Light is neither absorbed nor reflected by the objects, passing “like water flowing around a rock,” according to the researchers. As a result, only the light from behind the objects can be seen.
Craziness.