Third-Order Optical Nonlinearity of LiX-Li₂O-TeO₂ and AgX-Ag₂O-TeO₂ (X=Cl, Br, I) Glasses

Abstract

Third-order optical nonlinear susceptibility x⁽³⁾ of LiX-Li₂O-TeO₂ and AgX-Ag₂O-TeO₂ (X=Cl, Br, I) glasses was measured by third harmonic generation method, and the influence of halide ions on x⁽³⁾ was examined. The x⁽³⁾ values were relatively high as 3-5×10^-13 esu for Li-system glasses and -10^-12 esu for Agsystem glasses. The hyperpolarizability of monovalent cation increased with increasing the polarizability of cation (Ag⁺>Li⁺) and that of the anion increased with anion radius (O^2-<Cl^-<Br^-<I^-).