Three-dimensional holographic display device

A method of recording and reproducing a holographic image comprising:

• (i) recording a holographic image using an optical system by illuminating an object laser beam and at least one reference laser beam onto a holographic display medium while a bias voltage is applied thereto, said holographic display medium constituted by a photorefractive organic composition,
• said photorefractive organic composition comprising at least one photorefractive organic polymer having a tri-alkyl amino side-chain group, wherein the tri-alkyl amino side-chain group is selected from the group consisting of the structure shown in general formula group 1:
• wherein R1, R2, R3, R4, R5, R6, and R7 are each independently selected from the group consisting of a hydrogen atom, a linear alkyl group with up to 10 carbons, a branched alkyl group with up to 10 carbons, a linear alkyloxy group with up to 10 carbons, a branched alkyloxy group with up to 10 carbons, and an aromatic group with up to 10 carbons;
• and
• (ii) reproducing the holographic image using said optical system by illuminating at least one reference laser beam onto the holographic display medium.