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Abstract
Organic crystals have nonlinear optical effects (NLO) that make them attractive for applications in frequency conversion and optical processing. Among these we find the amino acids. glycine is the simplest of all amino acids in the crystalline form, has three different polymorphs a, b and g in which the molecules exist in the dipolar form (NH3+CH2COO-). In this work, we obtained glycine crystals doped with erbium growth by slow evaporation at room temperature. The chemical composition of the crystal was determined by Fourier transform infrared (FTIR), and Raman spectroscopy and was conducted for glycine with different concentrations of erbium. The optical absorption spectrum recorded in the wavelength range of UV-vis revealed that the crystal has good optical transparency in the range of 350 to 1100 nm. The crystalline phase was determined by X-ray diffraction and the second harmonic generation efficiency of the crystal measured by using the Kurtz Perry modified method. Key words: Glycine, erbium, nonlinear optical effects (NLO), second harmonic generation (SHG).
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