T. Cardinal et al., CONTRIBUTION OF XAFS ANALYSIS TO THE STUDY OF THE CORRELATION BETWEENOPTICAL NONLINEARITY AND THE GEOMETRY OF TITANIUM SITES IN GLASSES, Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms, 97(1-4), 1995, pp. 169-171
In the context of a general investigation of the nonlinear optical pro
perties of glasses, we report here the effect of introducing TiO2 in v
arious silicate and borophosphate glass matrixes. A correlation study
is carried out between the magnitude of the measured nonlinear indices
n(2) of these materials and the local structure around titanium which
can be deduced using XAFS analysis. This allows to point out that squ
are-based pyramids are particularly efficient when present in borophos
phate glasses.