Optically controlled image storage in azobenzene liquid-crystalline polymer films |
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| Authors: | C Wang H Fei J Xia Y Yang Z Wei Q Yang G Sun |
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| Institution: | (1) Department of Physics, Jilin, University, Changchun 130023, P.R. China, CN;(2) Ping Yuan University, Xinxing 453003, P.R. China, CN |
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| Abstract: | We report on optically controlled image storage based on photo-induced alignment in azobenzene liquid-crystalline polymer
films. Measurements reveal that the polymer film possesses photo-induced birefringence of large magnitude and the characteristic
of long-term optical storage. The photo-induced alignment process is used for storing images. The stored image is read from
the film placed between two crossed polarizers. It is demonstrated clearly that the alignment of the azo chromophores as well
as the stored image can be easily controlled by choosing the appropriate polarization of the irradiating light or by rotating
the film.
Received: 20 October 1998 / Revised version: 7 December 1998 / Published online: 31 March 1999 |
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| Keywords: | PACS: 42 30 Wb 42 70 Ln |
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