Parametric conversion in micrometer and sub-micrometer structured ferroelectric crystals by surface poling.

G. Assanto, A. Piccardi, R. Barboza and A. Alberucci

International Journal of Optics, Article ID 606892, (2012)


We report on recent technological improvements concerning nonlinear patterning of Lithium Niobate and Lithium Tantalate in the micrometer and sub-micrometer scales using Surface Periodic Poling for ferroelectric domain inversion. The fabricated samples were employed for frequency doubling via Quasi-Phase-Matching both in bulk and guided wave geometries, including forward and backward configurations and wavelength conversion in bands C and L. We also investigated short-period quasi-periodic samples with randomly distributed mark-to-space ratios.