What are metasurfaces?

Metasurfaces are ultra-thin, engineered surfaces composed of arrays of subwavelength structures designed to manipulate electromagnetic waves in specific ways. Unlike traditional materials, metasurfaces can control light or other electromagnetic waves at a very fine scale, enabling applications such as advanced lenses, holography, and invisibility cloaks. Researchers and engineers working with metasurfaces often engage in designing, fabricating, and testing these nanostructures to achieve unique optical or electromagnetic properties not found in nature.