Kiran, A.J.Satheesh Rai, N.Udayakumar, D.Chandrasekharan, K.Kalluraya, B.Philip, R.Shashikala, H.D.Vasudeva Adhikari, A.V.2026-02-052008Materials Research Bulletin, 2008, 43, 3, pp. 707-713255408https://doi.org/10.1016/j.materresbull.2007.03.030https://idr.nitk.ac.in/handle/123456789/27743A bis-chalcone derivative, p-(N,N-dimethylamino) dibenzylideneacetone was synthesized. Its third-order nonlinear susceptibility was determined to be as high as 10-12 esu by employing single beam Z-scan and degenerate four wave mixing techniques using Nd:YAG 7 ns laser pulses at 532 nm. The compound was doped in to poly(methylmethacrylate) matrix and the third-order nonlinearity was investigated by using Z-scan technique. The nonlinear refractive index of the doped polymer is found to be negative, and its magnitude is of the order of 10-10 esu. The results show that the compound exhibits strong reverse saturable absorption and a good optical limiting property and hence may be used as a promising dopant material. The study on concentration dependence of nonlinear optical parameters has been presented. © 2007 Elsevier Ltd. All rights reserved.Laser pulsesNonlinear opticsOptical materialsPolymer matrixPolymethyl methacrylatesRefractive indexNonlinear optical parametersNonlinear susceptibilityOptical limiting propertyOrganic polymers