Nonlinear disorder mapping through three wave mixing

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

IEEE Photon. J. 2 (1), 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