Abstract
The original technique based on the laser confocal microscopy and Raman spectroscopy was applied for the domain visualization in the bulk of lithium niobate LiNbO3 (LN) single crystal. The change of the Raman spectrum in the vicinity of the domain walls of LN was used. The technique capabilities were inspected in LN with different types of domain geometry. The estimation of the spatial resolution at different depth was carried out for periodically poled LN. The proposed analysis of the three-dimensional nanodomain image allows us to characterize the evolution of the self-assembled nanodomain structures produced in LN with surface layer modification.
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