Creating ‘metamaterials’ with negative(-) refractive index
The team of German scientist, lead by Gunnar Dolling at the University of Karlsruhe, has won the coveted race for creating materials with negative refractive index. The effect has been observed in a nanostructure (made from alternating layers of silver and magnesium fluoride on glass) at 780nm (far red end of the visible spectrum).
Read more about this at New Scientist.