Specific features of nonlinear optical effects in several stilbene derivatives

Measurements of three different stilbene derivative molecules incorporated into the PMMA and polycarbonate (PC) matrices using 10 ns Nd:YAG nanosecond laser λ = 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 β (SHG) and the magnitude polarizability tensor α for various excitation energies for the three modified stilbenes principally confirm the obtained results.