Single crystal growth and enhancing effect of glycine on characteristic properties of bis-thiourea zinc acetate crystal

Muley

Materials Science-Poland

et al. 2018

Self Cite

Present investigation is aimed to explore the single crystal growth, microhardness and third order nonlinear optical (TONLO) properties of Nd3+ doped zinc tris-thiourea sulphate (ZTS) crystal. The commercial slow solvent evaporation technique has been chosen to grow a good quality ZTS (12 mm × 0.5 mm × 0.3 mm) and Nd3+ doped ZTS (11 mm × 0.6 mm × 0.4 mm) single crystals. Vickers microhardness test has been employed to analyze the influence of Nd3+ dopant on the hardness behavior of ZTS single crystal. The TONLO effects occurring in Nd3+ doped ZTS single crystal have been evaluated by means of Z-scan technique using a He–Ne laser operating at 632.8 nm. The close and open aperture Z-scan configuration have been used to determine the nature of TONLO refraction n2 and absorption β, respectively. The magnitudes of vital TONLO parameters, such as refraction n2, absorption coefficient β, figure of merit and susceptibility χ3 of the Nd3+ doped ZTS single crystal, have been determined using Z-scan transmittance data. The n2, β, and χ3 of Nd3+ doped ZTS single crystal were found to be of the order of 10−10 cm2/W, 10−6cm/W and 10−5 esu, respectively.

Section: Resultsmentioning

confidence: 99%

Comparative analysis on microhardness and third order nonlinear optical traits of pure and Nd³⁺ doped zinc tris-thiourea sulphate (ZTS) crystal

Muley

Materials Science-Poland

et al. 2018

Self Cite

Materials Science-Poland

“…The enhanced SHG efficiency originates due to several factors of glycine dopant, namely (a) noncentrosymmetric symmetry, (b) high dipole moment and (c) enhanced charge transfer over the donor-acceptor network [32]. In the literature, it is reported that doping of glycine has constructive impact on SHG efficiency of bis-thiourea cadmium formate [27] and bis-thiourea zinc acetate [33] crystals. The observed enhancement in SHG efficiency of KDP crystal due to glycine dopant is superior to that facilitated by other amino acids namely L-aspartic acid (1.06) [15], L-histidine (0.93) [18], L-arginine (1.77) and L-alanine (1.67) [20].…”

Section: Resultsmentioning

confidence: 99%

Linear-nonlinear optical, dielectric and surface microscopic investigation of KH₂PO₄ crystal to uncover the decisive impact of dopant glycine

Khan¹,

Kalainathan

Baig

et al. 2018

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Present investigation has been started to perform the comparative study of pure and glycine doped KH 2 PO 4 (KDP) single crystals grown by most commercial slow solvent evaporation technique. The grown crystals were subjected to single crystal X-ray diffraction analysis to determine their structural parameters. The linear optical studies of pure and glycine doped KDP crystal have been undertaken within 200 nm to 1100 nm wavelength range by means of UV-Vis studies. The enhancement in second harmonic generation (SHG) efficiency of glycine doped KDP crystal has been determined using a standard Kurtz-Perry powder test. The dielectric measurements have been carried out to explore the impact of glycine dopant on dielectric constant and dielectric loss of KDP crystal. The surface growth habitat and etch pit density of glycine doped KDP crystal have been evaluated using the results of microscopic etching studies. In light of obtained results the suitability of glycine doped KDP crystal for device applications has been discussed.

“…higher temperature reflects the presence of space charge, ionic, orientation and electronic charge polarization due to the impedance offered by the parallel plate capacitor to the motion of charge carriers between the electrode and it is attributed to the perfection of the MADNBA crystal [42][43][44]. The value of dielectric constant saturates and attains a constant value at higher frequency and it reveals the diminishing nature of the exhibited polarizations with the introduction of dipole rotation.…”

Section: Dielectric Studiesmentioning

confidence: 99%

Growth, linear- nonlinear optical studies and quantum chemistry formalism on an organic NLO crystal for opto-electronic applications: experimental and theoretical approach

et al. 2020

An organic non-linear optical material of 4-methylanilinium 3,5-dinitrobenzoate (MADNBA) was synthesized and crystals of MADNBA were grown by employing slow evaporation solution growth technique. The crystal structure was confirmed from Single crystal XRD. Grown crystals were characterized by Powder XRD, UV-Vis-NIR, Photoluminescence and Laser damage threshold measurement studies. Infrared spectroscopy, thermal analysis and microhardness measurement were performed to study the molecular vibration, thermal behaviour and mechanical stability of the grown crystal. Dielectric studies have been performed to evaluate various solid state parameters. From the Kurtz Perry powder technique, it was found that Second harmonic generation efficiency of the obtained compound is 10 times that of the standard potassium dihydrogen phosphate. Z-Scan technique was also carried out to investigate the non-linear activity and optical limiting behaviour of MADNBA crystal. Computational analysis performed upon the optimized geometry of MADNBA molecule using Density Functional Theory confirmed the experimentally determined quantities under a strong theoretical background. Frontier molecular orbital analysis and molecular electrostatic potential analysis were carried out. The non-linear character of the compound was also determined by computing various non-linear optical parameters like dipole moment, polarizability and hyperpolarizability. The first order hyperpolarizability (β) value of the MADNBA molecule was evaluated to be 8 times that of the standard urea molecule. Based on these results, it could be proposed that MADNBA material serves as a potential candidate for frequency doubling, optical limiting and photonic applications in optoelectronics domain.