The nonlinear optical single crystals of diglycine barium chloride monohydrate were grown by slow evaporation solution growth technique from the mixture of an aqueous solution of glycine and barium chloride in the ratio 2:1 at room temperature. The grown crystals were characterized by various techniques such as single crystals X-ray diffraction, FTIR, UV-Vis-NIR spectra, Vickers hardness studies, thermogravimetric analysis, and fluorescence spectra. Its second harmonic generation efficiency was measured by Kurtz and Perry powder technique using Nd :YAG laser.
Single crystal of lithium potassium sulphate, a nonlinear optical material, was grown from aqua solution by slow evaporation method at room temperature. The cell parameters were estimated by single crystal X-ray diffraction analysis. The optical transmittance of the crystal was recorded using the UV-Vis-NIR spectrophotometer and the optical band gap was calculated using this method. The second harmonic generation efficiency was measured by Kurtz and Perry powder technique and the phase-matching property was confirmed. The hardness of the material was measured by Vicker's hardness test.
Single crystals of tris (Thiourea) magnesium sulphate (MTS) were grown from aqueous solution by low temperature solution growth technique. The grown crystals have been characterized by X-ray diffraction to confirm the formation of the crystalline phases. The presence of functional groups was identified by Fourier transform infrared spectroscopy. The optical transmission spectrum showed that a lower cut-off wavelength of MTS crystal is below 300 nm and it has a wide transparency window, which is suitable for second harmonic generation of laser in the blue region. The thermal stabilities were studied by differential thermal analysis (DTA) and thermo gravimetric analysis (TGA). Nonlinear optical characteristics of MTS were studied using Q-switched Nd:YAG laser (λ=1064 nm ). The micro-hardness studies reveal the mechanical properties of the grown crystals.
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