Organic nanoparticle (hyperbranched polymer)-dispersed photopolymers for volume storage

We report on the use of hyperbranched polymers (HBPs) acting as mobile organic nanoparticles doped in methacrylate photopolymers for highly efficient volume holographic recording. Two types of reduced HBPs having the average size of 10 nm are synthesized. The diffraction efficiency near 100% in the green (532 nm) and substantive polymerization-shrinkage suppression in this photopolymer system are demonstrated. Periodic assembly of HBPs under holographic exposure is also observed.