Optical Coatings and Gratings

Optical coatings and gratings are engineered surfaces designed to control how light reflects, transmits, or diffracts at material boundaries, spanning everything from the thin-film layers that eliminate glare on camera lenses to the periodic nanostructures that split light into its component wavelengths for spectroscopy. Researchers draw on techniques like glancing angle deposition—where material is vapor-deposited at steep angles to grow precisely sculpted nanostructures—and take inspiration from biological surfaces such as moth eyes, which suppress reflection through geometry rather than chemistry alone. A central challenge is extending these capabilities across broader wavelength ranges and harsher environments, since most coatings are optimized for narrow conditions and degrade under heat, moisture, or mechanical stress. Active directions include integrating photonic crystals into solar cell surfaces to recover light that would otherwise be lost, and developing scalable fabrication routes that can bring laboratory-grade nanostructured coatings into industrial production.

Works

53,653

Total citations

441,840

Keywords

Antireflective CoatingsNanostructuresThin-Film MaterialsOptical GratingsBiomimetic SurfacesGlancing Angle Deposition