Congruently grown lithium tantalate crystals containing ferroelectric domain structures have been illuminated with ultraviolet light along the crystallographic c axis with simultaneous application of an external electric field. This gives rise to a star-shaped light diffraction pattern in the transmitted beam. The characteristics of this phenomenon are investigated and compared with those observed in lithium niobate crystals.
© 2004 Optical Society of America
(160.2100) Materials : Electro-optical materials
(160.2260) Materials : Ferroelectrics
(190.1900) Nonlinear optics : Diagnostic applications of nonlinear optics
(190.4400) Nonlinear optics : Nonlinear optics, materials
Manfred Müller, Elisabeth Soergel, and Karsten Buse, "Light Deflection from Ferroelectric Domain Structures in Congruent Lithium Tantalate Crystals," Appl. Opt. 43, 6344-6347 (2004)