Abstract
The complex studies of optically induced piezooptics and second harmonic generation (SHG) are performed for the [NH2(C2H5)2]2CuxCo1−xCl4 nanocomposites in a form of films and bulks. The corresponding nanoparticles (NP) were embedded into different polymer matrices with content of NP varying from 1 % up to 9 % in weight units. The changes of the photoinduced optical SHG were caused by simultaneous illumination of two bicolour coherent laser beams and simultaneously applied dc-electric field at different temperatures, above glass transition temperature. The fundamental 1,064 nm Nd: YAG laser duration was equal to 12 ns. A comparison of the same features with the analogous crystals doped with Fe2+ was carried out. The samples doped by Fe3+ ions have shown substantially less photo induced SHG up to one order. The time kinetics of the photoinduced changes after the switching off the external laser fields was studied. Temperature dependences of the piezooptics and the SHG near the incommensurate phase existence were explored.
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