Kamath, L.Manjunatha, K.B.Shettigar, S.Umesh, G.Narayana, B.Samshuddin, S.Sarojini, B.K.2020-03-312020-03-312014Optics and Laser Technology, 2014, Vol.56, , pp.425-429https://idr.nitk.ac.in/handle/123456789/11777A series of new chalcones containing terphenyl as a core and with different functional groups has been successfully synthesized by Claisen-Schmidt condensation method in search of new nonlinear optical (NLO) materials. Molecular structural characterization for the compounds was achieved by FTIR and single crystal X-ray diffraction. The third-order NLO absorption and refraction coefficients were simultaneously determined by Z-scan technique. The measurements were performed at 532 nm with 7 ns laser pulses using a Nd:YAG laser in solution form. The Z-scan experiments reveal that the compounds exhibit strong nonlinear refraction coefficient of the order 10-11 esu and the molecular two photon absorption cross section is 10-46 cm 4 s/photon. The results also show that the structures of the compounds have great impact on NLO properties. The compounds show optical power limiting behavior due to two-photon absorption (TPA). 2013 Elsevier Ltd.Article