Wedge-shaped metal–dielectric composite metamaterials for light control

We propose wedge-shaped composite metamaterials consisting of alternate metal and dielectric layers capable of light control. We simulated the energy-stream distributions of the silver/alumina composites with different pairs of the alternate layers and different ways of arrangement. The simulation results show that the composite structure can control the directions of light and the transmitted light can carry sub-wavelength information. Such a controller has potential applications in sub-wavelength focusing and imaging, optical communication and tailoring.