Switchable holographic gratings

Details Switchable holographic gratings Switchable holographic gratings

G - Physics

03

H

G03H 1/04 (2006.01)

Patent

CA 2586359

The present invention includes systems and compositions of holographic grating structures devices and methods for fabricating such holographic grating structures. The method uses steps of preparing a composite mixture (100) having a polymerizable matrix, a liquid crystal, and a photo-oxidant dye, producing an interference pattern from two interference beams (110) and (160), wherein the two interference beams originate from a recording laser beam (110) directed by a low energy laser, and projecting the interference pattern on the composite mixture (100) to form a holographic grating structure. 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.

Systèmes et compositions de structures de réseaux holographiques, dispositifs et procédés de fabrication de telles structures. Le procédé comprend les étapes de préparation d'un mélange composé (100) comprenant une matrice polymérisable, d'un cristal liquide, et d'un colorant photooxydant, la production d'un modèle d'interférence à partir de deux faisceaux d'interférence (110 et 160), les deux faisceaux provenant d'un faisceau laser d'enregistrement (110) orienté par un laser faible énergie, et la projection du modèle d'interférence sur le mélange composite (100) afin de former une structure de réseau holographique. Cette structure assure une efficacité de diffraction de premier ordre d'au moins environ 30 % d'efficacité de diffraction réglable par l'application d'un champ électrique.

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