Formation and optical characteristics of sol-gel derived highly oriented ferroelectric (Sr,Ba)Nb2O6 optical waveguide thin films

Abstract

Highly c-axis oriented SBN thin films with various compositions were obtained by sol-gel process. The preferential orientation of sol-gel derived film was enhanced by poling the film with high dc electric field, and growing the film on seeded MgO substrate. The mechanisms of these methods were discussed in this study. For their optical waveguide applications, the optical properties of SBN thin films were investigated. The anisotropy of refractive indices (n(o) and n(e)) of the oriented films decreased certainly as Sr content in the film composition increased.