Crystal Growth Of Potassium 3,5-Dinitrobenzoate (KDNB) For Third Order Nonlinear Optical (NLO) Applications

The semi-organic nonlinear optical single crystals of potassium 3,5-dinitrobenzoate (KDNB) were grown by slow evaporation solution technique (SEST). The lattice parameters of the grown crystal were confirmed by single crystal X-ray diffraction analysis. The optical transmittance, cut-off wavelength and band gap of the KDNB crystal were obtained by UV-Vis NIR spectrum analysis. Vickers microhardness analysis was carried out to identify mechanical stability and work hardening co-efficient of the grown crystal. The crystalline perfection of the grown crystal was identified by chemical etching study using water as etchant. The third-order nonlinear optical properties such as nonlinear refractive index (n(2)), nonlinear absorption co-efficient (beta) and third order nonlinear susceptibility (chi((3))) KDNB crystal were evaluated using Z-scan technique at the wavelength of 632.8 nm.