Synthesis and Multiscale Evaluation of LiNbO_3-Containing Silicate Glass-Ceramics with Efficient Isotropic SHG Response

摘要

A study of bulk second harmonic generation (SHC) response of lithium niobium silicate glass-ceramics is presented. The observed macroscopic SHC signals have a.n isotropic 3D nature. To interpret this particular nonlinear optical response, a multiscale approach is used in which clear correlations between structure and optical response are characterized from the sub-micrometer to the millimeter scale. In particular, it is inferred that the radial distribution of the LiNbO_3 crystallites in spherulite domains is at the origin of the isotropic bulk second order optical property. It is suggested that spheru-litic crystallization in glass-ceramic is a challenging method to elaborate isotropic nonlinear optical properties in inorganic materials.