Materials Palette, palette knife, a range of brushes, three sheets of primed white paper, paints: cadmium lemon; cadmium yellow; cadmium red; alizarin crimson; cobalt blue; ultramarine blue When two ...

Light–matter interactions have advanced our understanding of atoms, molecules and materials, and are also central to a number of areas of applied science. Although optical interactions have received a ...

Four-wave mixing A weak optical signal (red) from a spacecraft transmitter can be amplified noise-free when it encounters two pump waves (blue and green) in a receiver on Earth. (Courtesy: Chalmers ...