Three-Dimensional Optical Storage Memory

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Science  25 Aug 1989:
Vol. 245, Issue 4920, pp. 843-845
DOI: 10.1126/science.245.4920.843


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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