Impact of Impurities on the alpha-LiIO3 Crystal Growth: Technique for Measuring the 'Dead Zone'

摘要

Lithium iodate (alpha-LiIO3) single crystal is a promising nonlinear optical material, which used for efficient laser radiation conversion in the visible and near-IR regions. A technique for measuring the "dead zone" (Delta T-dz) of LiIO3 solutions has been developed; data on the impact of Fe(IO3)(2), AgIO3, CsOH, H3PO4, and methyl methacrylate on the growth of the (100) face of alpha-LiIO3 crystals have been presented; and the dependences of the nucleation and motion of single steps on the degree of supersaturation have been measured. It is shown that the Delta T-dz value makes it possible to estimate the validity of solutions for growing alpha-LiIO3 crystals. The results of measuring the face growth rates and step velocities for KDP and alpha-LiIO3 crystals are compared.