IR Li2Ga2GeS6 nanocrystallized GeS 2-Ga2S3-Li2S electroconductive chalcogenide glass with good nonlinearity

Abstract

GeS2-Ga2S3-Li2S electroconductive glasses were prepared by the conventional melt-quenching method through carefully controlling the heating rate. Comparing with the reference of glass-forming region, our investigated GeS2-Ga 2S3-Li2S system was extended to the cation ratio of 0-20% Li with around 40% Ga. GeS2-Ga2S 3-Li2S glass-ceramics containing IR Li2Ga 2GeS6 nonlinear nanocrystals were obtained by the more carefully controlled heating rate. Its optical nonlinearity was investigated by the Maker fringe measurements, the maximum second harmonic intensity was observed to be 0.35 of the reference Z-cut quartz. IR Li2Ga 2GeS6 nonlinear crystals were directly obtained at the composition of 40GeS2-30GaS1.5-30LiS0.5.