Second-order optical nonlinearities, d33, of LaBGeO5, LiBGeO4 and Ba2TiGe2O8 crystals in transparent crystallized glasses were estimated by means of the Maker fringe technique. Transparent surface crystallized glasses were fabricated by crystallization of a glass with the exact or close stoichiometric composition of each crystal. The d33 values of ∼0.13 pm/V for LaBGeO5, ∼0.7 pm/V for LiBGeO4 and ∼7 pm/V for Ba2TiGe2O8 crystals were obtained. The crystallized glass consisting of Ba2TiGe2O8 crystals with pyramidal TiO5 units has the largest d33 value of the crystallized glasses reported so far, and its value is comparable to the d22 value of LiNbO3 single crystal. It is proposed that LiBGeO4 and Ba2TiGe2O8 crystals can be considered as new candidates for optical nonlinear crystals.
- Optical nonlinear crystal
- Second order optical nonlinearity
- Transparent crystallized glass
ASJC Scopus subject areas
- Physics and Astronomy(all)