Abstract

Last years, organic materials and structures were strongly investigated for applications in photonics [1]. In our previous research, we found that samples of fatty acids (FA) and mixtures of FA with other substances in a thin (μm) layer showed liquid crystals (LC) smectic type properties. Experimental results concerning the texture of these samples, their answer to some external stimuli, as for example an external electric field, a magnetic field, at the temperature variation, in integral incoherent and in laser coherent light beams, under some microparticles beams, while in LC state, were presented, in agreement with the literature [2]. Nonlinear optical effects obtained even at low c.w. laser power or in pulsed laser beams, were different in terms of the: saturated/unsaturated character of the acid, of the impurity amount, and of external perturbations.

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