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Proceedings Paper

Co-located permanent photochromic and erasable photorefractive holographic images
Author(s): L. Michael Hayden; Shane J. Strutz
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Paper Abstract

The dual nature of Lemke-e allow us to write both permanent and erasable holographic gratings in the same storage volume. In the presence of a triplet excited sensitizer, Lemke-e undergoes a photochemical reaction allowing the storage of permanent photochromic holographic gratings. At wavelengths longer than the triplet state of the sensitizer, the composite behaves photorefractively, allowing the storage of erasable holograms in the same location as previously stored permanent photochromic holograms. Photochromic gratings can be written in less than one minute while photorefractive gratings can be written in less than one second. The photochromic gratings have a dark lifetime of several days. Storage times, write times, read cycles and multiplexing results are also presented.

Paper Details

Date Published: 23 October 1998
PDF: 6 pages
Proc. SPIE 3471, Xerographic Photoreceptors and Organic Photorefractive Materials IV, (23 October 1998); doi: 10.1117/12.328169
Show Author Affiliations
L. Michael Hayden, Univ. of Maryland/Baltimore County (United States)
Shane J. Strutz, Univ. of Maryland/Baltimore County (United States)


Published in SPIE Proceedings Vol. 3471:
Xerographic Photoreceptors and Organic Photorefractive Materials IV
Stephen Ducharme; James W. Stasiak; James W. Stasiak, Editor(s)

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