Systematics and Relationship between Physical Properties and Micro-and Macrostriiciure of Noncentrosymmetric Oxide Crystals. Part II. Nonlinear Optical Properties of Binary Oxide Crystals.

Abstract

The ellipses of acentrisity have been established for 7 affinic groups of noncentrosymmetric binary oxide crystals, including the oxides with specific combination of acentric physical properties and two different chemical bond lengths L(E-O) and L(Ì-Î). The extreme dependences of nonlinear optical sysceptibility (?(2)) on L(E-O) have been found for the sets of polar and nonpolar oxides possessing measurable nonlinear optical properties. Three characteristic regions con-taming the crystals with different (?(2)) level have been revealed into the rosette of ellipses: crossing part of the ellipses; two symmetric parts of ellipses away the crossing part.