Layer-by-layer assembled highly reflective optical coatings

Abstract

Polyelectrolyte/colloidal TiO₂ composite films have higher refractive index than glass, while polyelectrolyte/colloidal SiO₂ composite films have lower refractive index. By using a layer-by-layer assembling technique, polyelectrolyte/TiO₂ nanoparticle-λ/4-layers and polyelectrolyte/SiO₂ nanoparticle-λ/4-layers were alternatively deposited onto optical fibers and microscope glass slides. In this way, λ/4-high-reflection optical coatings were fabricated.