Multilayered Inhomogeneous Holographic Diffraction Structures in Photopolymerizing Compositions with Liquid Crystals

This article presents theoretical models of forming multilayered inhomogeneous holographic diffraction structures in photopolymerizing compositions containing nematic liquid crystals with light diffraction on them. The results of numerical simulation of the kinetics of forming the amplitude of the first harmonic of the refractive index for each layer are presented taking into account the photoinduced optical absorption of the material. Based on the results of numerical simulation, it is shown that the profile view for each of the gratings can transform during recording and be inhomogeneous in depth, which can lead to the distortion of the selective response of such structures. Optimization of the composition for each layer can allow the formation of more homogeneous grating profiles, thereby reducing the distortion of the diffraction characteristics, and the use of an external electric field for each diffraction layer will allow controlling the type of selective response of such structures.