We have realized novel electrode configurations for efficient periodic poling of ferroelectric crystals by applying a simple patterning method based on laser-induced material ablation. The new geometries were theoretically investigated and compared with conventional configurations. A systematic optimization of the patterning according to the ablated profile led to high-quality quasi-phase-matched structures in lithium niobate with a grating period of 20 μm . The periodically poled samples were characterized by use of third-order second-harmonic generation of a Nd:YAG laser.
© 1998 Optical Society of America
(160.2260) Materials : Ferroelectrics
(160.3730) Materials : Lithium niobate
(220.4000) Optical design and fabrication : Microstructure fabrication
(230.4320) Optical devices : Nonlinear optical devices
M. Reich, F. Korte, C. Fallnich, H. Welling, and A. Tünnermann, "Electrode geometries for periodic poling of ferroelectric materials," Opt. Lett. 23, 1817-1819 (1998)