Abstract

Single crystals of the semi organic materials L-Alanine sodium nitrate (LASN) and D-Alanine sodium nitrate (DASN) were grown from an aqueous solution by slow evaporation technique. X-ray diffraction (XRD), studies were carried for the doped grown crystals. The absorption of these grown crystals was analyzed using UV-vis-NIR studies, and it was found that these crystals possess minimum absorption from 200 to 1100 nm. An infrared (FTIR) spectrum of single crystal has been measured in the 4000-400 cm^-1range. The assignment of the observed vibrational modes to corresponding symmetry type has been performed. A thermo gravimetric study was carried out to determine the thermal properties of the grown crystal. The efficiency of second harmonic generation was obtained by a variant of the Kurtz-Perry method.

Key words: Nonlinear optical, second harmonic generation, Alanine sodium nitrate.