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Photoinduced changes of transmittance and refractive index of 5CB nematic liquid crystal doped with anthraquinone dye under the action of femtosecond laser pulses are studied. The processes are considered in terms of strong interaction between liquid crystal matrix and dye molecules that is demonstrated by the example of fluorescence spectra.Spatial profile transformation of the femtosecond laser beam

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Dielectric properties of new composite material single crystal KDP matrix with incorporated anatase nanocrystals were investigated by terahertz time-domain spectroscopy in a wide temperature range. It was shown that anatase nanoparticles significantly effect on dielectric properties of KDP crystals in THz range. It was obtained that dielectric permittivity drastically changes at the temperature below phase transition

Paper contains experimental results and theoretical estimations of quasi-phase matched second harmonic generation in PPLN, where the nonlinear grating vector is noncollinear to wave vectors of fundamental radiation and its second harmonic.