Abstract

Magnesium oxide doped stoichiometric lithium niobate (MgO:SLN) is one of the popular materials for electro-optic, nonlinear optic and piezoelectric devices. In particular, it is widely used for quasi-phase matched (QPM) devices owing to its high photorefractive-damage resistance and low coercive field [1,2]. To obtain desired QPM structure, the fine control of QPM domains is necessary. However, MgO:SLN possesses a specific hexagonal domain shape due to its atomic configurations on the crystallographic plane [3,4], so the understanding of the domain wall dynamics along the plane is inevitable. In this work, therefore, a mesospheric approach was suggested by adopting a simple microscopic 2-dimensional Ising model to analyze the observed macroscopic domain wall motions of MgO:SLN.

© 2015 IEEE