Journal
JOURNAL OF MATERIALS CHEMISTRY
Volume 22, Issue 13, Pages 6245-6250Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2jm16591k
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Funding
- Russian Foundation of Fundamental Research [11-03-12054 ofi_m, 11-03-01406-a]
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For the first time the possibility to perform dual recording in cholesteric LC polymer films was demonstrated by means of helix pitch photo-tuning and holographic grating recording, as far as these two photo-processes take place under the exposure to light with different wavelengths. For this purpose the cholesteric mixture of the nematic azobenzene-containing copolymer doped with the chiral-photochromic dopant was prepared and the photo-optical properties of thin planarly-oriented films of this mixture were investigated. It was found that the holographic grating recording over similar to 1 min allows high diffraction efficiency values to be reached but does not disrupt the supramolecular helical structure that makes possible a two independent images recording.
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