Nonlinear Optical Properties of TeO2-Based Glasses: MOx-TeO2 (M = Sc, Ti, V, Nb, Mo, Ta, and W) Binary Glasses |
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Authors: | Sae-Hoon Kim Toshinobu Yoko |
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Affiliation: | Institute for Chemical Research, Kyoto University, Uji, Kyoto-Fu 611, Japan |
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Abstract: | The third-order nonlinear optical susceptibilities, X(3), of TeO2-based glasses containing transition metal oxides (M = Sc2O3, TiO2, V2O5, Nb2O5, MoO3, Ta2O5, and WO3) glasses have been measured by the third harmonic generation (THG) method in order to investigate the effect of the empty d-orbital contributions to the third-order nonlinear optical susceptibilities. It is found that the addition of TiO2, Nb2O5, and WO3 to TeO2 glass increases the X(3) value as well as the refractive index, while others decrease both of them. The positive effect of the TiO2, Nb2O5, or WO3, on the X(3) of TeO2 glass was interpreted in terms of the cationic empty d-orbital contribution. There is an almost linear relation between the X(3) and the term (n2ω+ 2)3.(n2ω -1).Ed/E20 containing three measurable parameters only, irrespective of the kinds of MO, which was derived based on the bond orbital theory developed by M. E. Lines. The largest X(3) value obtained is 1.69 × 10?12 esu for 30NbO2.5.70TeO2 glass, about 60 times larger than that of pure fused silica glass. |
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