Refractive index values are reported for sol-gel derived PbTiO3 thin-layers as a function of thermal
processing conditions. Dense amorphous layers were formed at 350°C (n = 2.35) with crystallization at
450°C (ii = 2.65). A spin-casting method is described for the deposition of coatings. Ellipsometry was
used to monitor optical properties as a function of heat-treatment conditions.