Kevis Bullis writes: “A new nanostructured material makes it possible to replace bulky lenses and other optical devices with a thin sheet of material such as silicon.” The creator, Federico Capasso, a professor of applied physics at Harvard, “says his materials are useful for holographic 3-D imaging and augmented reality, in which computer-generated images appear to be overlaid on the real world.”
The step taken is that the material that used to work only with green light now also works with red and blue. While the material used to bend light of different wavelengths at different angles it now bends them at the same angle.