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quartz storage Disks
A simple square of glass may hold the key to the vexing problem of storing data indefinitely. Developed by Hitachi, the technology prints a binary series of dots upon a sliver of quartz glass which can then be easily read with a common microscope. It sounds simple enough, and that is exactly the point – the data can be easily accessed no matter what the future technologies of the digital age bring. Even better, the data is safe from fire, chemicals, and water – almost anything, except perhaps a hammer. The chip uses common quartz glass made for beakers and measures a scant 2mm thick and 2cm2. Four layers of dots are sandwiched together, resulting in a data density of 40 megabytes to the square inch, or enough to hold a CDs worth of information. The glass is stable under heat up to 1832°F, and it resists most chemicals and water. Hitachi plans to increase the amount of data that can be stored while maintaining the optical characteristics of the glass. On a very similar note, researchers at the University of Southampton also recently announced that they were able to record and retrieve five dimensional digital data using a quartz crystal. The Superman (a reference to the film) memory crystal, as they've called it, is a futuristic storage technique with unprecedented features – including a 360TB per disc data capacity, thermal stability up to 1000°C and a practically unlimited lifetime. The data is recorded via self-assembled nanostructures created in fused quartz, which is able to store vast quantities of data for over a million years. The information encoding is realised in five dimensions: the size and orientation in addition to the three dimensional position of these nanostructures,' say the researchers. In lay terms, it means using ultrafast lasers, which encodes a piece of quartz with 5D information in the form of nanostructured dots separated by only one millionth of a meter. The self-assembled nanostructures change the way light travels through glass, modifying polarisation of light that can then be read by combination of optical microscope and a polariser, similar to that found in Polaroid sunglasses.
Seventh Son
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