Ethyl p-amino benzoate (EPAB): A novel organic non-linear optical material for optical devices

A new organic NLO material ethyl p-amino benzoate (EPAB) was grown in large size measuring 15 × 5 × 3 mm3 by slow solvent evaporation technique for the first time in literature. Several pure and mixed solvents were investigated in order to grow a reasonable optical quality crystal. A suitable solvent for the bulk growth of EPAB single crystal was reported. The cell parameter values were determined by X-ray powder diffraction studies. Fourier Transform Infrared spectroscopic analysis was carried out on the grown sample to ascertain the fundamental functional groups. Thermal behavior of the grown EPAB sample was analyzed by TG&DTA analysis. The optical transmission studies and second harmonic generation (SHG) efficiency studies justified the device quality of the grown crystal and the SHG study reveals that the grown sample having nearly six times higher efficiency than potassium dihydrogen phosphate (KDP), a well-known NLO material.