Characterization of two photon absorption cross section (δ) in chalcones compounds - Manoel, Diego da Silva; Rodriguez, Ruben Fonseca; Rosa, Rosa Silva Lima; Perez, Caridad Noda; Martins, Felipe Terra; Gonçalves, Pablo José; De Boni, Leonardo; Mendonça, Cleber Renato (Brazilian MRS Meeting, 2018)