An extensive investigation of crystalline, nonlinear, piezoelectric, optical, phase purity and electro-optic properties of doped ammonium dihydrogen phosphate single crystals

Abstract

Pure single crystals of ammonium dihydrogen phosphate (ADP) and crystals containing 1, 3, and 5[Formula: see text]mol% of itaconic acid (ITA) were generated by the slow evaporation of an aqueous solution. With the help of powder X-ray diffraction and Fourier transform infrared spectroscopy, we were able to show that doping puts a lot of stress on crystals. According to the of Vickers microhardness results, the addition of ITA causes the ADP to have a greater degree of abrasiveness. The SHG efficiency of ITA-doped ADP is greater than that of pure ADP. The presence of dopant was established using the energy-dispersive spectroscopy. The [Formula: see text]-scan method was used to investigate the third-order nonlinear optical characteristics of ITA–ADP crystals formed by the slow evaporation method on a variety of planes. A He–Ne laser with a wavelength of 632.8[Formula: see text]nm was used to carry out the investigation. The nonlinear absorption coefficient, nonlinear refractive index, and third-order nonlinear susceptibility of the ITA–ADP crystals were also plotted in detail. The piezoelectric charge coefficient of pure ADP is lower than that of the ITA-doped ADP. Analysis of the electro-optic investigation reveals lesser half-wave voltage of doped ADP.