By Duanyi Xu
This ebook offers ideas and purposes to extend the cupboard space from 2-D to 3D or even multi-D, together with grey scale, colour (light with various wavelength), polarization and coherence of sunshine. those actualize the advancements of density, potential and information move expense for optical facts garage. additionally, the utilized implementation applied sciences to make mass information garage units are defined systematically. a few new mediums, that have linear absorption features for various wavelength and depth to mild with excessive sensitivity, are brought for multi-wavelength and multi-level optical garage. This publication can function an invaluable reference for researchers, engineers, graduate and undergraduate scholars in fabric technological know-how, info technology and optics.
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Multi-dimensional Optical Storage
This booklet offers ideas and functions to extend the cupboard space from 2-D to 3-D or even multi-D, together with grey scale, colour (light with diversified wavelength), polarization and coherence of sunshine. those actualize the advancements of density, ability and knowledge move fee for optical info garage.
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Additional info for Multi-dimensional Optical Storage
Sample text
It could have various applications in near-field optical storage, near-field microscopy and lithography. 1 Metal and Its Oxides Medium On the film of metal and its oxides makes a physical hole or pit with semiconductor etching process to instead injection process to manufacture optical disc. This M-DISC looks just like conventional CD, but its size or figure could be diversification and may allows higher storage density and capacity as shown in Fig. 20. If the material can be decompose at a certain temperature that can be writeable and add this function to conventional CD drive.
2 Multilayer and Multilevel Optical Recording with Different Reflectance The multilevel optical recording method is shown in Fig. 21, it implemented four level or more recording schemes in an inorganic material disc that used either two or three recording layers. Each of the recording regions represent two-bits data, and every bit has a different reflectance for easy recognition. The recording density can be double or triple, depending of the schemes. However, the mark size difference between two or three recording layers is also enlarged due to excessive heat diffusion.
985” program) all together that make of most funds for optical storage in China. Tsinghua University takes on holography storage system, SIL design and manufacturing, multi-wavelength multi-level optical storage systems and PB level integration optical storage application systems. Other subprojects are arranged as Physics Chemistry Institute of CAS for organic medium, Beijing University of Technology and Beijing Polytechnic University for holography system, stability and reliability of holography storage, Nankai University in Tainjin for inorganic medium, Harbin Institute of Technology in Herbin for crystal medium to holography storage, Huanzhong Science and Technology University in Wuhan for encoding, decoding and data superspeed transfer, University of Science and Technology of China for quantum memory, multilayer and polarization state storage, Shanghai University for optical system design and manufacturing.