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Grating Formation in 13-demethyl Bacteriorhodopsin Film |
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| Authors: | J. Vanhanen S. Parkkinen V. P. Leppanen T. Jaaskelainen J. P. S. Parkkinen |
| Affiliation: | (1) Department of Physics, Väisälä Laboratory, University of Joensuu, P.O.Box 111, FlN-80101, Joensuu, Finland;(2) Department of Biology, University of Joensuu, P.O.Box 111, FlN-80101, Joensuu, Finland;(3) Department of Computer Science, University of Joensuu, P.O.Box 111, FlN-80101, Joensuu, Finland |
| Abstract: | Holographic properties of a 13-demethyl retinal bacteriorhodopsin (13-demethyl BR) film in gelatin matrix were investigated and compared to those of a native bacteriorhodopsin (BRWT) film. A two-wave mixing experiment was performed to study the self-diffraction efficiency of the samples. The rise and the decay of the grating in the 13-demethyl BR film was measured. The film is relatively slow enabling the recording of simultaneous gratings. Phase conjugate reflectivity was measured by a four-wave mixing experiment. Diffraction efficiency and phase conjugate reflectivity of the 13-demethyl BR film were observed to be comparable to those of the BRWT film. |
| Keywords: | bacteriorhodopsin halobacterium salinarium retinal analogues 13-demethyl retinal self-diffraction diffraction efficiency phase conjugation |
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