In the present paper for the first time we study the influence of simultaneous polarized optical treatment (10 ns Nd: YAG lasers with power density 0.6 GW/cm(2)) together with electrostatic dc electric field (up to 8 kV/cm) on self-assembled multi-layer films samples. The second-order optical susceptibility (SOS) achieves the maximal values after one minute simultaneous dc-electrical-optical treatment. Further treatment will not enhance the values and even leads to the decrease of SOS. The independent measurement of the local temperature shows that local heating do not excess 8.6 K. (C) 2008 Elsevier B.V. All rights reserved.