Switchable holographic gratings
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United States of America Patent
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Dec 1, 2009
Grant Date -
Apr 6, 2006
app pub date -
Oct 4, 2004
filing date -
Oct 4, 2004
priority date (Note) -
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Abstract
The present invention includes systems and compositions of holographic grating structures devices and methods for fabricating such holographic grating structures. The method comprises the steps of preparing a composite mixture comprising a polymerizable matrix, a liquid crystal, and a photo-oxidant dye, producing an interference pattern from two interference beams, wherein the two interference beams originate from a recording laser beam directed by a low energy laser, and projecting the interference pattern on the composite mixture to form a holographic grating structure. As described, the holographic grating structure yields a first-order diffraction efficiency of at least about 30% diffraction efficiency which may be adjusted by the application of an electric field.
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