Three-Dimensional Optical Storage Memory

@article{Parthenopoulos1989ThreeDimensionalOS,
  title={Three-Dimensional Optical Storage Memory},
  author={Dimitri A. Parthenopoulos and Peter M. Rentzepis},
  journal={Science},
  year={1989},
  volume={245},
  pages={843 - 845}
}
A novel three-dimensional (3-D) optical memory device is presented that allows fast random access of the information and extremely high bit densities. This device is based on two-photon writing, reading, and erasing of the information in a photochromic material embedded in a polymer matrix. Absorption and emission data show that two-photon writing and reading of information is feasible. The advantages and properties of such a 3-D optical memory are discussed. 
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