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Saturday, July 13, 2013

New optical memory

5D nanostructured quartz glass optical memory could provide ‘unlimited’ data storage for a million years

"Superman memory crystal" recordings could survive the end of the human race
July 10, 2013
5D_optical_memory
5D optical memory disc (credit: University of Southampton)
University of Southampton and Eindhoven University of Technology.scientists have developed a new technology that could store vast quantities of information — 360 TB on a disc, about 100 times more than current disk drives — for more than a million years [1].
‘Superman memory crystal’
Using a high speed femtosecond laser, data is written  on self-assembled nanostructures created in fused quartz, and stored in five dimensions: size and orientation in addition to the three-dimensional position on the nanostructured material.
Each disc has three layers [2] of nanostructured dots, with dots separated by five microns (one millionth of a meter) [3]. The self-assembled nanostructures change the way light travels through glass, modifying polarization of light that can then be read by combination of optical microscope and a polarizer, similar to that found in Polaroid sunglasses.[4]/.../

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