New 5D-discs store up to 360 GB of data
British scientists at Southampton University have succeeded in creating an emergency storage tank with storage technologies in five dimensions (5D). This CD can store huge amounts of data on a glass substrate, but unlike conventional DVD and Blu-ray discs may do so for an indefinite period of time without loss of data integrity. Scientists claim that the 5D optical media may have a density of data storage of up to 360 gigabytes per disk, and if they do not kill them deliberately, then stored on media data can survive more than one generation.
At first glance, the storage of data in five dimensions, it sounds like some fantasy . But in fact, the new technology provides data storage that is in five different resolutions - planes or surfaces. In a conventional silicon glass, there are two measurements - length and width, but the depth of the data recording takes place on three different levels of glass. The fourth and fifth levels of the missing are provided thanks to the special nanostructure surface of the glass, resulting in refraction and polarization of light beams on interesting rules. To write data in a specially marked points using a special high-frequency laser (operating in the femtosecond range of frequencies). Femtosecond laser in this case generates a beam that shines only 280 femtoseconds (280 quadrillion seconds).
This decision is due to the drive surface nanostructure and some features of the holographic image will record up to three bits of data in two resolutions. changing the focal center of the laser research team was able to create several layers of pins, which are separated by a layer of five microns (0.005mm) in the third z-dimension. Then, by simply moving the laser in the horizontal and vertical direction, the three bits of data may be stored in two dimensions, thus justifying name technology 5D. order to read the data blocks of data, has been used an optical microscope capable of recognizing the polarization of light reflected from the three-bit block information.
So far there is no information on how the same way glass optical disc can be rewritten, but the accompanying documentation says that the new technology is much like writing style WORM (Write Once Read Many). As you can imagine, writing three bits of data in one point (PINE), and expanding the number of three additional layers, you can increase storage capacity of up to epic proportions. The researchers argue that one 5D-drive, you can burn up to 360 terabytes of data.
According to another, the most advanced recording technology data on the hard disk HAMR (based on a memory effect in the thermal heating), which will be soon implemented in commercial devices, the maximum amount of data on the disk can be up to 20 terabytes, which is still inferior to the development opportunities of British scientists .
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