Latent ultrafast laser-assisted domain inversion in congruent lithium niobate

A full study of the latent coercive field modification and domain expansion dynamics is reported in the paper. In this investigation a transparent cell was used for the illumination and poling of the crystals which allowed in situ observation of the domain formation (via stress-induced birefringence and electro-optic refractive index contrast at the inverted domain boundaries).