Third-Order Optical Nonlinearity of LiX-Li<sub>2</sub>O-TeO<sub>2</sub> and AgX-Ag<sub>2</sub>O-TeO<sub>2</sub> (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 (O2-<Cl-<Br-<I-).