Method for forming a multiple charge generating photorefractive polymer composite for hologram writing

An apparatus comprising:

• a photorefractive (PR) polymer composite including;
• a charge transporting polymer (CTP) matrix, and
• a photosensitizer comprising a quantum dot (QD) material with a first band gap coupled to a nanoparticle material with a second band gap greater than the first band gap,
• a pair of electrodes contacted to opposing sides of the PR polymer composite to apply an external electric field across the PR polymer composite;
• a light modulator configured to receive image data of a plurality of 3D perspective views of an object from a plurality of fixed directions;
• a lens configured to focus an object beam transmitted through the light modulator for each 3D perspective view within the PR polymer composite from a first side of the PR polymer composite;
• and
• a reference beam directed within the PR polymer composite at each fixed direction from a second side of the PR polymer composite opposite to the first side and to interfere with the object beam within the PR polymer composite to impress an index pattern within the PR polymer composite of the 3D perspective view of the object at each fixed direction.

A method comprising:

• combining a charge transporting polymer (CTP), a plasticizer, a non-linear optical (NLO) chromophore, and a quantum dot (QD) sensitizer in a solvent to form a mixture;
• sonicating the mixture;
• evaporating the solvent to obtain a composite;
• and
• melt processing the composite between a pair of electrodes to obtain a photorefractive polymer composite.