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Title: Investigation of third-order nonlinear and optical power limiting properties of terphenyl derivatives
Authors: Kamath, L.
Manjunatha, K.B.
Shettigar, S.
Umesh, G.
Narayana, B.
Samshuddin, S.
Sarojini, B.K.
Issue Date: 2014
Citation: Optics and Laser Technology, 2014, Vol.56, , pp.425-429
Abstract: A 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.
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