Nonlinear Disorder Mapping Through Three-Wave Mixing

Abstract

We implement a simple and powerful approach to characterize the domain distribution in the bulk of quadratic ferroelectric crystals via far-field second-harmonic spectroscopy. The approach is demonstrated in a lithium tantalate sample with periodic electric field poling and random mark-to-space ratio.

Keywords

• Second-harmonic generation
• random quasi phase matching
• image analysis