Effect of l-proline dopant on structural, optical, dielectric, and NLO properties of imidazolinium l-tartrate (IMLT) single crystals

The slow evaporation solution growth approach was used to grow the crystals of pure and l -proline doped imidazolium l -tartrate (IMLT), an organic nonlinear optical materials. According to single crystal and powder XRD analysis, the grown crystals show monoclinic structure and alterations in diffraction peak locations related to the dopant l -proline. The effects of the dopant on the optical properties of the formed crystals are revealed by the transmittance spectrum measurements. Band gap and cut-off wavelength are affected by l -proline in to IMLT single crystals. The surface morphology of the grown crystals was examined by the etching study which reveals the growth mechanism of pure and l -proline doped IMLT crystals. Etch pits in rectangular pattern were found to appear. The dielectric and AC conductivity of IMLT was significantly improved by l -proline doping. The intensity of Second Harmonic Generation is found to be 3.7 times higher than that of KDP crystals. A range of analysis suggests suitability and potentiality of IMLT crystal for various optoelectronic applications.