Nonlinear optical characterization of DNA based azo-polymers
H. El Ouazzani, O. Krupka, V. Smokal and B. Sahraoui
The nonlinear optical response of spin deposited thin films of DNACTMA-azobenzenes has been investigated by means of THG Maker fringes measurements at a fundamental wavelength of 1064 nm. In that case, the measurements were performed using an Nd:YAG laser as the excitation source with 30 ps laser pulses. A theoretical and experimental study is presented for of conjugated systems associated to the DNA. A strong enhancement of the THG signal is observed which is related to the different charge transfer within the molecules.
Keywords: DNA based azo-polymers, conjugated systems, NLO, THG