Optoelectronics & Communications Generating a superdirective beam from metamaterials using Fourier optics
When a material is coupled with a metamaterial exhibiting opposite optical properties, they can annihilate. A portion of space is optically removed as a result, allowing light to propagate through the whole structure without diffraction. 1 Optical antimatter behavior is a generalization of the superlens effect, where metamaterial properties are exploited to overcome the diffraction limit. These extraordinary electromagnetic media are also expected to give rise to other interesting phenomena. In particular, an extremely directive beam appears when a divergent beam, or an internal point source, impinges on a medium with a refractive index close to zero.Metamaterials are artificial materials with structures specifically engineered to have optical properties that are not found in nature, such as a negative refractive index. We use thousands of coupled slabs of equal or almost equal thickness comprising air, which has a refractive …