Karakas, A.Dag, T.El Ouazzani, H.Sebiaai, K.Boughaleb, Y.2020-03-262020-03-2620140306-89191572-817Xhttps://dx.doi.org/10.1007/s11082-013-9725-xhttps://hdl.handle.net/20.500.12395/31262To provide an insight into the third-order nonlinear optical (NLO) behaviour of a series of tetrathiafulvalene (TTF)-based molecules, the third-order NLO properties and two-photon absorption characterizations have been theoretically investigated by means of the time-dependent Hartree-Fock method. According to ab-initio calculation results, the examined molecules exhibit second hyperpolarizabilities with non-zero values, implying microscopic third-order optical nonlinearity. Our computed results are also in good agreement with the previous experimental observations on the title compounds.en10.1007/s11082-013-9725-xinfo:eu-repo/semantics/closedAccessTwo-photon absorptionThird-order nonlinear optical propertiesPyrrolo-tetrathiafulvalene derivativesArticle461165170WOS:000329322800017Q3