27 November 2012 Hydrogen bonded supramolecular azopolymers: a media for multilayered and polarization-multiplexed data storage based on two-photon process
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Abstract
Supramolecular azopolymers were prepared through strong hydrogen bonding interaction between pyridine moiety of poly (4-vinylpyridine) (P4VP) and phenol moiety of 4-nitro- 4’-hydroxyazobenzene (AzoOH). A multilayered composite film with supramolecular azopolymers as a recording layer and polyvinyl alcohol (PVA) as a spacing layer was prepared through alternately stacking. Under two-photon excitation, azobenzene chromophore can be orientated perpendicularly to the polarization direction of the writing beam via trans-cis-trans photoisomerization, yielding optical birefringence. Polarization-multiplexed and multilayered optical data storage were demonstrated by encoding two letters in the same region of each of the two layers based on the property.
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Daqiao Hu, Daqiao Hu, Yanlei Hu, Yanlei Hu, Wenhao Huang, Wenhao Huang, Qijin Zhang, Qijin Zhang, "Hydrogen bonded supramolecular azopolymers: a media for multilayered and polarization-multiplexed data storage based on two-photon process", Proc. SPIE 8559, Information Optics and Optical Data Storage II, 85590J (27 November 2012); doi: 10.1117/12.2000686; https://doi.org/10.1117/12.2000686
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