Single-layer anti-reflective coatings are the simplest and often
the most sensible solution. With just a single layer of a well -chosen
compound, reflection at a specific wavelength can be
reduced almost to zero. Additionally, unlike multilayer
coatings, there is no wavelength or angle of incidence at which
the reflection is greater than is reflected off an untreated
substrate.1 While the “perfect” compound to make an antireflective
coating for visible wavelengths does not yet exist,
single layer anti-reflective coatings still are often implemented
in this range.