Abstract
The electro-optical coefficients r ij and half-wave voltage V λ /2 of strontium-barium niobate crystals poled in the ferroelectric phase are shown to vary along the polar axis. The r ij ( z ) and V λ /2 ( z ) dependences indi- cate the presence of a residual domain density D ( z ) and clearly depend on the sign of the polarizing field, with r ij being minimum ( D being maximum) near the negative electrode. This character of the D ( z ) distribution and, hence, the r ij ( z ) and V λ /2 ( z ) coordinate dependences can be explained by predominant domain nucleation near the negative electrode, which is revealed when the switching processes are studied using 90 ° (Rayleigh) light scattering from domain walls. © 2005 Pleiades Publishing, Inc.
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