Three-Dimensional Optical Storage Memory

  title={Three-Dimensional Optical Storage Memory},
  author={Dimitri A. Parthenopoulos and Peter M. Rentzepis},
  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. 
High-density three-dimensional optical data storage in a stacked compact disk format with two-photon writing and single photon readout
Using a polymer block doped with a highly efficient two-photon dye, we have achieved a high density data storage with gray-scale control in multiple planes as stacked compact disks at a separation of
Three-Dimensional Multi-Layered Bit-Oriented Optical Storage
Three-dimensional multi-layered optical storage is one of the most promising methods that break the limitation of recording density in optical storage. It stores the bit information onto the
Two-photon volume information storage in doped polymer systems
Volume information writing and reading is demonstrated for two photochromic materials doped in polymer systems that may be utilized in a 3D optical memory. Writing and reading in volume is achieved
Three-dimensional optical data storage using three-dimensional optics
Three-dimensional optical memory with photorefractive mate- rials is discussed for ultra-high density/capacity memory exceeding the classical limit of a conventional optical recording system. Bit
Photorefractive optics in three-dimensional digital memory
To exceed the capacity limitation of the surface-recording method of current optical data storage, the third dimension is introduced with photorefractive materials. Photorefractive materials are
Potentials of two-photon based 3-D optical memories for high performance computing.
An optical volume memory based on the two-photon effect which allows for high density and parallel access and has the advantages of having high capacity and throughput which may overcome the disadvantages of current memories.
Three-dimensional optical data storage in a novel photochromic material with two-photon writing and one-photon readout
We have demonstrated three-dimensional optical data storage in a novel photochromic material with two-photon excitation. The data are read out with a homemade confocal fluorescence microscope
Three-dimensional patterned media for ultrahigh-density optical memory
We report a recording medium in which a three-dimensional nanoscale structure can be photofabricated for multilayered optical memory using a two-photon process. By fabricating the structures in the
Two-photon recording in three-dimensional photorefractive data storage
  • H. Ishitobi, S. Kawata
  • Physics
    Technical Digest. Summaries of Papers Presented at the Conference on Lasers and Electro-Optics. Conference Edition. 1998 Technical Digest Series, Vol.6 (IEEE Cat. No.98CH36178)
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This work uses a near-infrared pulse laser to record bit data with a two-photon absorption process and describes the method that completely solves the problem of two photon photorefraction in ferroelectric crystals in bit-oriented three dimensionalPhotorefractive memory.


Experimental holographic read-write memory using 3-d storage.
A mockup of an experimental 3-D holographic read-write memory that uses superimposed holographic pages in a thick photosensitive medium and the thick erasable storage medium used is iron-doped lithium niobate is described.
Analyses of bit-oriented optical memories using photochromic media.
To be able to erase at the same rate as data are written, the erase source must have a power output as much as an order of magnitude greater than that of the write source, and this may present a serious problem.
Single‐crystal lithium niobate has been used as a holographic storage medium. The material undergoes a change in refractive indices upon exposure to suitably intense light thus allowing it to act as
  • Polym. Sci. 50, 17 (1983). 5 April
  • 1989
Bertelson, in Techniques of Chemistry: Photochromism
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