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)

Abstract:

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.