Nonlinear Optics for Crystallographic Analysis in Lead Zirconate Titanate

Abstract

The azimuthal dependences of the optical second harmonic generation signal from crystallized regions (spherulites) of the ferroelectric phase in lead zirconate titanate films are investigated to determine the symmetry and orientation of crystallites. These dependencies in different regions of the same spherulite have different shapes, which indicates a difference in crystallographic orientations and/or symmetry. Based on the assumption of the possible presence of two syngonies and three orientations for each, the fitting of experimental azimuthal dependences by model curves was carried out, which provided information about the ratio of these phases and orientations in different areas of the film.