Domain Engineering in Lithium Niobate and Lithium Tantalate: Domain Wall Motion

The main aspects of domain engineering in LiNbO 3 and LiTaO 3 representing field induced formation of the tailored domains are discussed. The special attention is paid to sideways domain wall motion. Experimentally observed wall motion scenarios have been classified. It is discovered that the realization of the given scenario is defined by degree of deviation of the switching conditions from equilibrium characterized by ratio between switching and screening rates. It has been proved that the domain growth acceleration after merging is due to formation of super-fast X-oriented walls. The loss of wall shape stability and formation of nano-domains have been considered.