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Optics Letters

Optics Letters


  • Vol. 23, Iss. 9 — May. 1, 1998
  • pp: 730–732

Long holographic lifetimes in bacteriorhodopsin films

John D. Downie, Doğan A. Timuçin, Daniel T. Smithey, and Marshall Crew  »View Author Affiliations

Optics Letters, Vol. 23, Issue 9, pp. 730-732 (1998)

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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 thin 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.

© 1998 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(090.2900) Holography : Optical storage materials
(210.0210) Optical data storage : Optical data storage
(210.2860) Optical data storage : Holographic and volume memories

John D. Downie, Doğan A. Timuçin, Daniel T. Smithey, and Marshall Crew, "Long holographic lifetimes in bacteriorhodopsin films," Opt. Lett. 23, 730-732 (1998)

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  1. J. D. Downie and D. T. Smithey, Appl. Opt. 35, 5780 (1996).
  2. A. Popp, M. Wolperdinger, N. Hampp, C. Brauchle, and D. Oesterhelt, Biophys. J. 65, 1449 (1993).
  3. G. Váró and J. K. Lanyi, Biophys. J. 56, 1143 (1989).

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