Abstract

The growth of nonlinear optical crystals has emerged as a rapidly developing field. Inorganic, organic and semi-organic materials are attracting a great deal of attention in the field of nonlinear optics. In the present study, triglycine formate (TGF) crystals and magnesium chloride-added triglycine formate crystals were grown by the slow evaporation method. The elements present in the grown TGF crystals were identified by a CHNS analyser. The entry of metal ions into the TGF crystal was confirmed by an EDAX analyser. Fourier transform infrared spectroscopy studies of the grown crystals showed the presence of all the expected functional groups, which were not altered due to the entry of the dopant. Power X-ray diffraction of all the grown crystals revealed that the monoclinic structure and lattice constant varied with increasing dopant concentration. Optical studies were carried out by utilizing UV-visible and photoluminescence spectra to determine the potential applications. The mechanical strength of these crystals was studied using Vickers microhardness tester, and the crystals were found to be soft materials. Electrical properties such as the dielectric constant and dielectric loss were determined as a function of frequency at different temperatures using an LCR meter. The dielectric constant and dielectric loss of the grown crystals decreased with increasing frequency and increasing temperature. All the grown crystals have good second harmonic generation efficiency and are better for nonlinear optical properties.

中文翻译：

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溶液生长纯及添加杂质的甲酸三甘氨酸单晶的物理性质研究

摘要

非线性光学晶体的生长已成为一个快速发展的领域。无机、有机和半有机材料在非线性光学领域引起了广泛的关注。在本研究中，通过缓慢蒸发法生长了甲酸三甘氨酸（TGF）晶体和添加氯化镁的甲酸三甘氨酸晶体。CHNS 分析仪鉴定了生长的 TGF 晶体中存在的元素。通过 EDAX 分析仪确认金属离子进入 TGF 晶体。对生长晶体的傅里叶变换红外光谱研究表明存在所有预期的官能团，这些官能团没有因掺杂剂的进入而改变。所有生长晶体的功率 X 射线衍射表明，单斜晶结构和晶格常数随着掺杂浓度的增加而变化。利用紫外可见光谱和光致发光光谱进行光学研究以确定潜在的应用。使用维氏显微硬度计研究了这些晶体的机械强度，发现晶体是软材料。使用 LCR 表测定不同温度下频率函数的电特性，例如介电常数和介电损耗。生长晶体的介电​​常数和介电损耗随着频率的增加和温度的升高而降低。所有生长的晶体都具有良好的二次谐波产生效率并且具有更好的非线性光学特性。