Optical information storage of bacteriorhodopsin molecule film

Feng Chen; Baofang Li; Xun Hou; XingChang Li; Long Jiang; Markus Sanio; Norbert A. Hampp

doi:10.1117/12.409233

17 November 2000 Optical information storage of bacteriorhodopsin molecule film

Feng Chen, Baofang Li, Xun Hou, XingChang Li, Long Jiang, Markus Sanio, Norbert A. Hampp

Proceedings Volume 4109, Critical Technologies for the Future of Computing; (2000) https://doi.org/10.1117/12.409233
Event: International Symposium on Optical Science and Technology, 2000, San Diego, CA, United States

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. In this paper, we propose a system of optical information storage in a BR polymer 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. We have performed the reversible operations of 'write' and 'erase' with the BR polymer film over hundreds of cycles in our experiments. The readout contrast ratio is very sensitive to the intensity and wavelength of probe beam and the recorded data can be readout from 530 to approximately 630 nm with different contrast ratio. Within the range of 570 to approximately 600 nmm, the better contrast ratio can be obtained. Considering the erasing effect for the reason of absorption of P state, both higher contrast ratio and nondestructive reading can be realized by using 594 nm as the readout wavelength. The experimental result such BR material is very suitable for long-term photochromic information storage.

Citation Download Citation

Feng Chen, Baofang Li, Xun Hou, XingChang Li, Long Jiang, Markus Sanio, and Norbert A. Hampp "Optical information storage of bacteriorhodopsin molecule film", Proc. SPIE 4109, Critical Technologies for the Future of Computing, (17 November 2000); https://doi.org/10.1117/12.409233

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