Multilayer, Broadband Infrared Reflectors Based on the Photoinduced Preparation of Cholesteric Liquid Crystal Polymers.

Through the spin-coating and assembly of two layers of cholesteric photopolymerized monomers/chiral compounds with different pitches, at the same temperature, Sixous obtained a more or less significant diffusion between the two layers due to the concentration gradient leading to the diffusion of the chiral compounds across the film’s thickness, depending on various parameters such as the degree of cross-linking of the two layers, the thickness of the layer, the temperature dependence, and the time at a given temperature [ 24 , 25 ].

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