Third order nonlinear optical properties of hybrid mono crystals with n-conjugated systems

In this work present an experimental study of third-order optical properties using the degenerate four wave mixing ( DFWM ) method, we have measured and calculate the third-order susceptibility X^<3> at 532 nm of organic-inorganic hybrid compounds [ a) tryptophan nitrate (C₁₁H₁₃N₃O₅), b) adeninium dinitrate (C₅H₆N₇O₆), c) pyridinium nitrate (C₅H₆N₂O₃), d) d-phenylglycinium nitrate (C₈H₁₀N₂O₅), e) m-carboxyphenyl ammonium dihydrogenomonophosphate (C₇H₁₀O₆NP), f) cytosinium nitrate (C₄H₆O₄N₄), and g) m-carboxyphenyl ammonium dihydrogenomonophosphite (C₇H₁₀O₅NP)] witch have been prepared and characterized by spectroscopic analysis and crystallographic method. We have showed that there is a good agreement between the used theoretical model and the experimental results. We found that the studied compounds exhibit large second order hyperpolarisability (ϒ) values larger than CS₂ which is a reference material for DFWM.