Features of randomized electric-field assisted domain inversion in lithium tantalate

TL;DR

This paper investigates the statistical properties of domain inversion in lithium tantalate using random quasi-phase-matching, providing insights into poling dynamics and nonlinear optical processes.

Contribution

It introduces a non-invasive method to analyze the distribution of quadratic nonlinearity and poling dynamics in lithium tantalate through far-field profiling.

Findings

Statistical characterization of nonlinearity distribution

Demonstration of non-invasive poling analysis

Insights into domain inversion processes

Abstract

We report on bulk and guided-wave second-harmonic generation via random Quasi-Phase-Matching in Lithium Tantalate. By acquiring the far-field profiles at several wavelengths, we extract statistical information on the distribution of the quadratic nonlinearity as well as its average period, both at the surface and in the bulk of the sample. By investigating the distribution in the two regions we demonstrate a non-invasive approach to the study of poling dynamics.