Spatial Modulation of Linear and Quadratic Suceptibilities in Lithium Niobate crystals by using femtosecond laser pulses

G.A. TORCHIA, C. MÉNDEZ, D. DELGADO, J.R. VAZQUEZ DE ALDANA, I. ARIAS AND L. ROSO

Foz Iguazu, Brasil

Congreso; 11 th International Meeting of Ferroelectricity; 2005

In this work we present the spatial  control of the linear susceptibility (c1) in Lithium Niobate crystals by means of infrared ( 800 nm) femtosecond interaction. Diffraction gratings have been performed on the surface (relief) and inside (phase) of  these samples by femtosecond laser writing. Also we have performed a spatial control of the quadratic susceptibility (c2) by direct writing of a pattern of ferroelectric domains  on the surface of  z cut  substrates by using the second harmonic femtosecond pulses (400 nm). Finally, efficient  photonic devices for second harmonic generation via quasi phase matching could be obtained following the experimental procedure presented in this work.