Fabrication of domain-inverted gratings in MgO:LiNbO ₃ by applying voltage under ultraviolet irradiation through photomask at room temperature

Abstract

A new and simple fabrication method of domain-inverted gratings in MgO:LiNbO3 is demonstrated. It was found that ultraviolet (UV) light irradiation reduces the voltage for inversion. Domain-inverted gratings of ∼15 µm period were fabricated by voltage application at room temperature under irradiation of UV light periodically-patterned using a photomask.