A newly developed metasurface-based silicon antireflective coating combines rectangular and cylindrical meta-atom geometries. The metasurface achieves just 5 percent reflection, compared to ~50 ...

Refraction close refractionProcess by which a wave changes speed and sometimes direction upon entering a denser or less dense medium, eg a light ray changes direction when refracted by a lens. of ...

Thin-film coatings can be essential to obtaining the desired performance from an optical component. Stuart Allan describes the types available and provides purchasing advice. Optical thin-film ...