Formation of Bi2ZnB2O7 Nanocrystals in ZnO–Bi2O3–B2O3 Glass Induced by Femtosecond Laser

We report on the formation of Bi2ZnB2O7 crystal structures with designated patterns in ZnO–Bi2O3–B2O3 glass by femtosecond laser direct writing. The crystallization mechanism in glass is investigated by crystallization kinetics analysis and simulation of the three-dimensional temperature field distribution. The crystallized regions show larger third-order optical nonlinearity than the unirradiated region in glass by Z-scan technique. This finding is of great potential in application of nonlinear optical integrated devices and development of new nonlinear materials.

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