Third-order optical nonlinearities of 1,5-Diaminoanthraquinone for optical limiting application

Abstract

Third-order nonlinear optical properties of 1,5-Diaminoanthraquinone have been studied. The vibrational and optical properties of the compound were analysed experimentally by FT-IR, FT-Raman and UV–visible spectroscopic characterization combined with theoretical DFT method. Intermolecular interactions in the compound have been confirmed by Hirshfeld surface and its associated two-dimensional fingerprint plots. First- and second-order hyperpolarizabilities of the title compound were computed theoretically by B3LYP and CAM-B3LYP hybrid functionals at DFT level. The third-order nonlinear optical parameters such as nonlinear refractive index (n2), nonlinear absorption coefficient (β), real, imaginary parts of third-order susceptibility (χ(3)) and second-order hyperpolarizability (γ) of the title compound were measured experimentally by open and closed aperture Z-scan technique. The Z-scan results confirm the reverse saturable absorption behaviour and positive nonlinear refractive property of the dye. These attractive third-order nonlinear properties suggest the title compound can be a good candidate for optoelectronic and photonic applications, furthermore the optical limiting property and laser damage threshold studies recommend the compound can be a promising material for laser-assisted applications.