Unlike the partial invisibility cloak, this technology uses “metamaterial, a complex hybrid structure of metal and insulator that makes light move around an object like air flowing over an airplane wing” to make objects “dissapear”. CG animation after the jump.
In a process called refraction, these materials interact with light in such a way that it travels faster through the metamaterial than it does through a vacuum, the famed c in Einstein’s special theory of relativity. Properly tuned, the light emerges from the shield as if there were no object present. But unfortunately for would-be spies, it’s very difficult to make cloaking devices that work on more than one wavelength of light at a time