The role of Jahn–Teller ions in the creation of domain structures in lithium niobate

Аннотация

Using tightly focused laser beams, features of space charge fields (∼107 V/m) are studied through the photoionization of doped Jahn–Teller Fe²⁺ ions in LiNbO₃ single crystals. These fields can be used for selective formation of the inverse domain state following the additional application of a field with a strength below the coercive field. The characteristics of laser-induced domains and periodic domain structures are studied by laser-acoustic means.