Effect of UV irradiation on nonlinear optical response of azo-based iminopyridine rhenium complexes

The nonlinear optical properties of conjugated rhenium containing azo-based iminopyridine complexes were studied by means of Maker fringe technique using 30 ps laser pulses at 1064 nm. The influence of UV irradiation of guest-host films on nonlinear optical response was investigated. The values of second and third order susceptibility before and after UV irradiation were extracted and analyzed. The nonlinear optical response of the rhenium containing complex which contain lateral dimethylamino group and forms a D-A π-conjugated structure was found to be more sensitive to UV treatment.