Materials today: Proceedings χ (3) measurement and second harmonic generation of organic–inorganic hybrid compounds headed for optoelectronic applications-L cysteine hydrogen orthoborate

Abstract

Novel semi organic non-linear single crystal of L-cysteine hydrogen orthoborate was grown from aqueous solution by the slow evaporation technique at room temperature. The grown crystal was characterized by single crystal x-ray diffraction. The chemical composition of the crystal was identified by the energy dispersive x-ray analysis. The fourier transform infrared spectra were recorded to identify the functional groups presented in the sample. The transparency range of the material was analyzed by the UV–Vis-NIR measurements. The absorption studies showed that the UV cut-off wavelength to be at 224 nm. The transmission studies indicated a rapid and intensive transition at the cutoff wavelength. Crystals showed transparency in the entire visible region with 5.5 eV optical band gap and also showed an excellent second order nonlinear optical properties and third order susceptibilities. Z Scan measurements revealed the saturation absorption of the grown crystal. Such parameters as nonlinear refractive index, absorption coefficient and nonlinear optical susceptibility were determined. The thermal behavior of the grown crystal was analyzed by TG/DSC analysis, showed a major weight loss around 246 °C and that corresponds to the melting point of the sample that showed good thermal stability of the grown crystal. The laser damage threshold value for L-Cysteine hydrogen orthoborate was found to be 139 mJ/cm−2.