AI Article Synopsis
- A new optical storage device uses a combination of nematic liquid crystal, azobenzene, and photopolymerizable monomers to store images by controlling the material's birefringence before polymerization.
- The process involves a transition from nematic to isotropic phases driven by photoisomerization, requiring precise timing to ensure effective storage.
- The technology also suggests the possibility of creating grey-shades by utilizing the electric-field acceleration of reverse isomerization.
Article Abstract
A new type of optical storage device is described employing a material consisting of a host nematic liquid crystal, a photoisomerisable azobenzene component and a photopolymerizable monomer. The principle of image storing involves selectively controlling the birefringence of the medium immediately prior to photopolymerization of the monomer. We show that photoisomerisation driven nematic to isotropic transition can be employed to achieve this through proper timing of the reverse isomerization of the azobenzene compound before the nematic director fluctuations get quenched. It is also suggested that grey-shades can be created in this device using the recently discovered phenomenon of electric-field acceleration of reverse isomerisation.
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| http://dx.doi.org/10.1039/b906004a | DOI Listing |
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