Paper Details

A nonlinear optical L-alanine oxalate (LAO) single crystal was synthesized and successfully grown byslow evaporation technique at room temperature. The Crystal structure of the as grown crystals was determined bysingle crystal X-ray diffraction analysis and is compared with the powder X-ray diffraction and theoretically stimulatedone. The functional groups are identified by Fourier transform infrared spectral analysis and compared with simulatedspectrum. The nonlinear optical efficiency of L-alanine oxalate (LAO) was determined from Kurtz Perry powdertechnique and the efficiency is almost equal to that of standard KDP crystals. Thermal analysis (TG-DTA) reveals thepurity of the crystal and the sample is stable up to the melting point. HOMO–LUMO energies and first order molecularhyper polarizability of L-alanine oxalate (LAO) have been evaluated using density functional theory (DFT) employingB3LYP functional and 6-31G (d,p) basis set. Dielectric constant and dielectric loss of L-alanine oxalate (LAO) aremeasured in the frequency range from 50 Hz to 5 MHz at room temperatures.

K. Deepa, S.Arulmani, E. Chinnasamy, S. Senthil, J. Madhavan, “Optical and Theoretical studies on L-Alanine Oxalate: A Nonlinear Optical single crystal for frequency conversion application”, International Journal of Advance Engineering and Research Development (IJAERD), Vol. 5, Issue 3, pp. 659-667, March 2018.