Sb_2O_3-B_2O_3 二成分系ガラスの構造と非線形光学特性

概要

論文の詳細を見る
The third order nonlinear optical susceptibilities X^<(3)> of Sb_2O_3-B_2O_3 binary glasses have been measured by the third harmonic generation (THG) method. The IR and Raman spectroscopic study reconfirmed that the structure of Sb_2O_3 glass is similar not to senarmontite but to valentinite which consists of double-chains of SbO_3 units. The formation of BO_4 units is much smaller for Sb_2O_3-B_2O_3 glasses than Bi_2O_3-B_2O_3 glasses at all compositions, which is ascribed to the covalent character of Sb-O bonds. It is also considered that Sb_2O_3 is present as SbO_3 trigonal units and participates in the glass network formation through the Sb-O-B bonds. The X^<(3)> value increased monotonically with increasing Sb_2O_3 content up to 8.4 × 10^<-13> esu for Sb_2O_3 glass, which is about 30 times larger than SiO_2 glass. Modified Lines'linear relationship between X^<(3)> and (n_ω^2+2)^3・(n_ω^2-1)・E_d/E_0^2 was adopted to Sb_2O_3-B_2O_3 glasses.
1996-11-01