Growth, Spectral,Thermal, Second and Third-Order Nonlinear Optical Properties on L-Malic Acid Doped Ammonium Dihydrogen Phosphate (ADP) Single Crystals

Abstract

Ammonium dihydrogen phosphate (ADP) crystals were grown with L-malic acid as an additive in 0.2% molar percentage by slow evaporation method at room temperature. Addition of Amino acid has increased the quality of the crystals and also yields highly transparent defect free crystals. Powder XRD analysis reveals that the crystalline perfection of L-malic acid doped crystals is extremely good without having any internal structural grain boundaries.  A Fourier transform infrared (FT-IR) study confirms the functional groups of the crystals. The second harmonic generation efficiency of the crystals was determined by NLO studies. The UV-visible study confirms the wide optical transmittance window for the doped crystals imperative for optoelectronics applications. TG/DTA analyses were carried out to characterize the melting behavior and stability of the title compound. Intensity can be observed from the photoluminescence study.  The close and open aperture Z-scan configuration has been used to evaluate the nature of third order nonlinear optical refraction (n2) and absorption (β) for the grown LTADP single crystal.