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Title: Nonlinear optical properties of p-(N,N-dimethylamino)dibenzylideneacetone doped polymer
Authors: Kiran, A.J.
Satheesh, Rai, N.
Udayakumar, D.
Chandrasekharan, K.
Kalluraya, B.
Philip, R.
Shashikala, H.D.
Adhikari, A.V.
Issue Date: 2008
Citation: Materials Research Bulletin, 2008, Vol.43, 3, pp.707-713
Abstract: A 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.
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