Measurements of three different stilbene derivative molecules incorporated into the PMMA and polycarbonate (PC) matrices using 10 ns Nd:YAG nanosecond laser; lambda = 1064 nm) as the fundamental ones were done. The chromophore molecules were incorporated into the corresponding matrices and aligned by the dc-electric field up to 4 kV/cm during the spin coating. We have established that the optimal content of the chromophore corresponded to the concentration of about 8.9% in weighting units. The samples had a thickness of about 0.5 mm. Theoretical quantum chemical simulations of the theoretical hyperpolarizability tensor beta (SHG) and the magnitude polarizability tensor alpha for various excitation energies for the three modified stilbenes principally confirm the obtained results. (C) 2008 Elsevier B.V. All rights reserved.