Third order non-linear optical,diffractional, electrical,laser damage threshold,elemental and surface studies of l-methionine potassium hydrogen phthalate (LMKHP) single crystals

Journal of Materials Science: Materials in Electronics - In this study, semi-organic non-linear optical (NLO) crystal l-methionine potassium hydrogen phthalate (LMKHP) was prepared via the solvent...     

Synthesis,structural, topographical,linear and nonlinear optical,electrical and mechanical properties of Bisthiourea zinc acetate single crystal

Nonlinear optical material Bisthiourea Zinc Acetate (BTZA) was synthesized by slow evaporation solution growth technique. The grown crystals were characterised by Single crystal XRD and powder XRD studies. The presence of functional groups and the co-ordination of metal ions to Thiourea were confirmed by FTIR analysis. The UV-vis –NIR spectrum shows a low absorption in the entire visible and IR region. Optical band gap of the grown crystal was found to be 4.18 eV. The photoluminescence studies carried out and the crystal has blue emission. The Refractive Index was determined experimentally for the first time and found to be 1.508 for the incident wavelength of 632.8 nm. The second harmonic generation efficiency was determined using Kurtz and Perry powder technique and it was 0.7 times than that of the KDP crystal. Thermal properties were studied by thermo gravimetric analysis and differential thermal analysis. Dielectric studies were carried out at different frequencies for various temperatures. The mechanical behaviour of the grown crystal was studied using Vickers micro hardness tester. The growth mechanism and surface features are investigated by scanning electron microscopy (SEM) and atomic force microscopy (AFM).     

Experimental determination of metastable zonewidth,induction period,interfacial energy and growth of non-linear optical l-Glutamic Acid Hydrochloride single crystals

Single crystals of l-Glutamic Acid Hydrochloride (LGAHCl) were grown by low temperature solution growth technique. The induction periods were measured at various supersaturations and hence the interfacial energies were evaluated. The experimentally evaluated values of interfacial energies are found to be in good agreement with theoretically predicated values.