Callaghan Innovation Research Papers

Back to Research Papers

TitleHigh efficiency thick phase holograms in gelatin doped with methylene blue
Publication TypeJournal Article
Year of Publication1996
AuthorsBarnes, T.H., Haskell T.G., Woolhouse A.D., and Smith G.J.
JournalOptik (Jena)
Pagination70 - 74
Date Published1996
ISSN00304026 (ISSN)
KeywordsCrosslinking, Diffraction gratings, Doping (additives), Dyes, Fourier optics, Gelatin, Gels, Helium neon lasers, Holograms, Image reconstruction, Methylene blue, Micro molar concentrations, Peptide chains, Photocatalyst, Photocrosslinking, Photosensitivity, Polypeptides, Solutions, Thick phase holograms
AbstractWe report the writing of holograms in thick, wet, gelatin samples doped with micro molar concentrations of methylene blue, using HeNe laser radiation at 633 nm. No other dopant was used in the samples. The holograms form by photo-induced crosslinking of peptide chains during exposure and do not require development. We present results which show that diffraction efficiencies of up to 70% can be achieved with exposures of ∼ 1900 J/cm2, and demonstrate 3-D image reconstructions by recording Fourier-plane holograms in the material.

Back to top