Abstract
We prepared porous antireflection surfaces from spin-coating of poly(2,2,2-trifluoroethyl methacrylate) (PTFEMA) latex particles onto bare glass slides. Optical properties resulting from two different coating structures, multilayer and submonolayer of latex particles, were studied depending upon the particle size. In both cases, the characteristic matrix theory based on the classical Fresnel coefficient of reflection applied to estimate the effective refractive index and thickness of the porous coatings from experimentally measured reflectance spectra. The particle fraction in the coatings was estimated by using a volume-averaged refractive index. For porous multilayer coatings prepared from 47 nm PTFEMA latex particles, it was found that the effective refractive indices (neff ∼ 1.34) and reflectance minima (Rmin ∼ 0.7%) were almost constant and independent of the coating thickness. On the other hand, the effective refractive indices were strongly dependent on the coating conditions in the case of submono...
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