Scientists at the University of California in Berkeley have engineered a material that can bend visible light around objects. This development could soon result in technology that can render tanks, ships and troops invisible to the eye.
The head of research, Professor Xiang Zhang, said in the case of invisibility cloaks or shields, the material would need to curve light waves completely around the object like a river flowing around a rock.
In essence, an observer looking at the cloaked object would then see light from behind it, making it seem to disappear.
http://www.theregister.co.uk/2008/08...hin_our_grasp/