Patent ID: 8778568

Claim:
An optical data storage medium comprising: a polymer matrix comprising polyvinylalcohol, poly(alkyl methacrylate), poly(alkyl acrylate), polystyrene, polycarbonate, polyacrylate, poly(vinylidene chloride), poly(vinyl acetate), or a combination thereof; a reactant capable of undergoing a change upon triplet excitation, thereby causing a refractive index change, wherein the reactant comprises a cinnamate, a cinnamate derivative, a cinnamamide derivative, or a combination thereof; and a non-linear sensitizer capable of absorbing actinic radiation to cause upper triplet energy transfer to said reactant, wherein the non-linear sensitizer comprises a triarylmethane dye, a Pyronin Y dye, or a combination thereof; wherein the refractive index change capacity of the optical data storage medium is at least about 0.005.