Patent ID: 11243333

Abstract:
Optical structures, such as antireflective structures or Bragg gratings, may include multiple layers of high-index and low-index materials. The low-index materials may be approximately a quarter-wavelength in thickness (e.g., with respect to a center wavelength of incident light) and may include a nanovoided material. The high-index material may have a thickness of a half-wavelength and may include an oxide. The nanovoided material may include about 10% to 90% nanovoids by volume and may have an average index of refraction of about 1.05 to about 1.2. The antireflective structures or Bragg gratings may include multiple layers that can be optimized for layer count, thicknesses, and refractive indices to provide a reflectance below a given threshold for incident light of a given angular range. Various other methods, systems, apparatuses, and materials are also disclosed.