Growth of non-linear optical γ-glycine single crystals and their characterization

The non-linear optical γ-glycine single crystals were grown by low temperature solution growth methods from aqueous solutions with incorporation of known amount of sodium chloride as additive. Crystals were grown from pure aqueous solutions of glycine with a range of sodium chloride concentration. The change in morphology of the α-form of glycine with sodium chloride concentration and the occurrence of γ form at a critical concentration of sodium chloride were studied. The form of crystallization was confirmed by X-ray power diffraction method and the optical transparency of the γ-glycine in the UV-Vis-near IR region was studied by recording the optical transmittance spectrum.