John, Kiran, A.Mithun, A.Shivarama, Holla, B.Shashikala, H.D.Umesh, G.Chandrasekharan, K.2020-03-312020-03-312007Optics Communications, 2007, Vol.269, 1, pp.235-240https://idr.nitk.ac.in/handle/123456789/12264The third-order nonlinear optical properties of chalcone derivatives have been studied using the single beam Z-scan technique. The dependence of ?(3) on different donor and acceptor type substituents demonstrates the electronic nonlinearity of compounds. The largest value of nonlinear refractive index, n2, measured for a high electron donor substituted molecule is -2.033 10-11 esu. These molecules exhibit a strong two-photon absorption and interesting optical limiting of nanosecond laser pulses at 532 nm. 2006 Elsevier B.V. All rights reserved.Article