Patent ID: 7625674

Claim:
A method for fabricating a holographic grating structure comprising the steps of: preparing a composite mixture comprising a polymerizable matrix comprising a functional acrylic oligomer with a monofunctionality or functionality slightly larger than 1, wherein the oligomer is a low viscosity aromatic oligomer provided at about 45% to 48% of the composite mixture based on total mass; and a tetrafunctional crosslinker, a nematic liquid crystal that is about 25%to 30% of the composite mixture based on total mass, and a pre-mixed photo-redox catalysis mixture for a low energy laser comprising a photo-oxidant dye and an acid, wherein the photo-redox catalysis mixture is about 2% of the composite mixture based on total mass; producing an interference pattern from two interference beams, wherein the two interference beams originate from a recording laser beam directed by a the low energy laser; and projecting the interference pattern on the composite mixture to form a holographic grating structure.