John Kiran, A.Mithun, A.Shivarama Holla, B.Shashikala, H.D.Umesh, G.Chandrasekharan, K.2026-02-052007Optics Communications, 2007, 269, 1, pp. 235-240304018https://doi.org/10.1016/j.optcom.2006.07.073https://idr.nitk.ac.in/handle/123456789/27842The 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, n<inf>2</inf>, 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.AbsorptionAromatic compoundsLaser pulsesNonlinear opticsRefractive indexNonlinear optical propertiesNonlinear refractive indexOptical limitingTwo-photon absorptionZ-scanKetones