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Proceedings Paper

Optical storage characters of bacteriorhodopsin molecule film
Author(s): Feng Chen; Qing Yang; Hongcai Wu; Xun Hou
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Paper Abstract

The photochromic retinal protein bacteriorhodopsin (BR) is found in the cell membrane of Halobacterium salinarium. It is the key protein for photosynthetic growth of H.salinarium. BR shows an exceptional stability towards chemical, thermal, and photochemical degradation. The photochromic properties of Bacteriorhodopsin provide the possibility of application in optical information storage. Photoexcition of the O-state of BR, which has an all-trans confirmation, leads to a state with 9-cis configuration, which is thermally stable. The 9-cis containing photoproduct of the O-state was named P-state. It absorbs at 490 nm and can be photochemically reconverted to the initial state. We propose a system of optical information storage in a BR polymer film, which is a reversible optical data recording material and can be rewritten over 106 times without degradation of the film. A three-wavelength EDRAW (Erase Direct Read After Write) experiment was performed. The photoexcited P(490) state shows a permanent storage property confirmed by our contrast ratio experiments. The result of long-term information storage in BR films more than 1 year is obtained.

Paper Details

Date Published: 12 April 2002
PDF: 6 pages
Proc. SPIE 4536, International Workshop on Photonics and Imaging in Biology and Medicine, (12 April 2002); doi: 10.1117/12.462527
Show Author Affiliations
Feng Chen, Xi'an Jiaotong Univ. and Xi'an Institute of Optics and Fine Mechanics (China)
Qing Yang, Xi'an Institute of Optics and Fine Mechanics (China)
Hongcai Wu, Xi'an Jiaotong Univ. (China)
Xun Hou, Xi'an Institute of Optics and Fine Mechanics (China)


Published in SPIE Proceedings Vol. 4536:
International Workshop on Photonics and Imaging in Biology and Medicine

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