Two-photon three-dimensional bit optical data storage in photorefractive polymers

Summary form only given. Recently, we have reported on the three-dimensional (3D) optical bit data storage in photorefractive polymers using two-photon excitation, which allows one to develop a low-cost, erasable, and rewritable 3D optical storage method. The photorefractive polymer we used consists of 2,5-dimethyl-4-(p-nitrophenylazo)anisole, 2,4,7-trinitro-9-fluorenone, 9-ethylcarbazole and poly(N-vinylcarbazole).