Cloaking device makes invisible progress : Light-emitting objects problem whacked / Register, 28 Dec 2006

http://www.theregister.co.uk/2006/12/28/maxwell_invisiblity_cloak/
Chris Williams
"Mathematicians have proposed improvements to cloaking technology to hide objects which emit their own electromagnetic radiation. In October, a transatlantic team of scientists demonstrated the world's first working invisibility cloak, which uses metamaterials to bend electromagnetism around an object as if it weren't there."