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Optics Letters

Optics Letters


  • Vol. 26, Iss. 21 — Nov. 1, 2001
  • pp: 1702–1704

Reflection-type polarization holograms in bacteriorhodopsin films for low-light recording

T. Juchem and N. Hampp  »View Author Affiliations

Optics Letters, Vol. 26, Issue 21, pp. 1702-1704 (2001)

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Reflection-type polarization holograms with phase-conjugated readout are very useful for low-light recording with bacteriorhodopsin (BR) films. The dependence of reflection-type holograms with parallel and orthogonal recording beams on their intensity ratio (1:1–1:20) was investigated. It was found that for orthogonally polarized beams the phase-conjugated signal depends significantly less on the beam intensity ratio than predicted by coupled-wave theory. This finding is of particular relevance for recording of very low object-beam intensities with BR films, e.g., in interferometry, where signals with a high signal-to-noise ratio, owing to the different polarizations of the scattered light and the signal, and with low dependence of the diffraction efficiency on the ratio between the reference and object-beam intensities are obtained. With this asymmetric recording process, holograms were recorded successfully in BR films with a good signal-to-noise ratio at exposures (from the object side) as low as 50μJ/cm2 . These exposures are in the range of those typically used for silver halide films.

© 2001 Optical Society of America

OCIS Codes
(090.0090) Holography : Holography
(090.2880) Holography : Holographic interferometry
(090.2900) Holography : Optical storage materials
(160.4890) Materials : Organic materials

T. Juchem and N. Hampp, "Reflection-type polarization holograms in bacteriorhodopsin films for low-light recording," Opt. Lett. 26, 1702-1704 (2001)

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