Science and engineering of two photon 3D storage devices
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abstract
A high-density fast read-out 3D optical storage memory is developed which relies on the nonlinear absorption of two photons that causes changes in the structure and spectra of the excited molecule. The two states of the binary code, 0 and 1 are formed by the photo-chemical changes which lead to two distinct structures of the molecular species used as the storage medium. The stored information is read by illuminating the written bits with either one photon of the energy necessary to induce fluorescence or by simply intersecting two optical beams at that point. This optical storage memory has the capability of dynamic parallel-access needed to accommodate the demands of today's technologies.