New Breakthrough Could Lead To The First Optical Invisibility Cloak!
"A group of optical engineers at Stanford has succeeded in designing a broadband metamaterial that exhibits a negative refractive index over nearly the entire rainbow.
The new Stanford metamaterial consists of a three-dimensional periodic array made up of three artificial nanocrescent atoms. When tuned for visible light, the material would exhibit a negative refractive index over a band from blue to red, only missing the very extremes of the visible spectrum. However, the researchers claim that a few tweaks to its structure would make this metamaterial useful across the entire visible spectrum."
Source: http://www.gizmag.com/metamaterials-wide-spectrum-optical-invisibility-cloak-stanford/27813/
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