Subwavelength structures

Subwavelength structures are tiny patterns or features on a surface that are smaller than the wavelength of light (or other waves) interacting with them. Because of their small size, they can manipulate light in unique ways, such as controlling its direction, intensity, or color, which isn't possible with larger structures. These structures are used in advanced optics, like lenses, sensors, or invisibility devices, to enhance performance by finely controlling electromagnetic waves at very small scales, enabling new technological applications.