Nonlinear disorder mapping through three-wave mixing

A. Pasquazi, A. Busacca, S. Stivala, R. Morandotti, and G. Assanto

IEEE Photonics Journal 2, 18-28 (2010)


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.