Nonlinear Disorder Mapping Through Three-Wave Mixing
Alessia Pasquazi, Alessandro Busacca, Salvatore Stivala, Roberto, Morandotti, Gaetano Assanto
TL;DR
This paper introduces a straightforward method using far-field second-harmonic spectroscopy to map nonlinear disorder in ferroelectric crystals, demonstrated on lithium tantalate with periodic poling and random domain ratios.
Contribution
It presents a novel application of second-harmonic spectroscopy for nonlinear disorder mapping in ferroelectric materials.
Findings
Effective characterization of domain distribution in lithium tantalate
Successful implementation of the method on samples with complex domain structures
Potential for improved control of ferroelectric device properties
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.
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