Long holographic lifetimes in bacteriorhodopsin films
Long holographic lifetimes in bacteriorhodopsin films
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DOI：
10.1364/ol.23.000730
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发表时间：
1998-05-01
期刊：
影响因子：
3.6
通讯作者：
Crew, M
中科院分区：
文献类型：
--
作者：
Downie, JD;Timucin, D;Crew, M
The D85N genetic variant of bacteriorhodopsin (BR) displays a nearly permanent lifetime of the photochromic P(490) state. We present pump-probe measurements that demonstrate this behavior. However, diffraction efficiency measurements made from holograms recorded in a hydrated D85N film show markedly different decay behavior, suggesting that a molecular diffusion process is occurring in the film. Holograms recorded with different grating frequencies display correspondingly different decay times, thus supporting this hypothesis. A tl-lin D85N film was fabricated that was chemically cross linked, resulting in the elimination of diffusion of BR molecules within the polymer matrix. This film exhibits a grating lifetime of the order of weeks or more, thus permitting the long-term holographic storage of information. (C) 1998 Optical Society of America.
