Scientists have found a way as recorded on DVD-ROM petabytes of data

Jun

23

2013

Scientists have found a way as recorded on DVD-ROM petabytes of data

DVD

All, perhaps, it is known that the conventional DVD-drives can accommodate the 4.7 GB of information. If you want to keep the volume a little more, then come to the aid of Blu-ray drives, which are currently offering up to 128 GB (four-layer BDXL). However, researchers from the Swinburne University of Technology claim to have developed the method of optical data by which to a single DVD-ROM, you can fit almost 1,000 TB of data.

In the picture above you can see the red laser beam inside the violet ray , which greatly compresses and blocks some of it. With this method, the size “zeros” and “ones” who actually make the information obtained is extremely small. The key to the ability to record such amount of information in a compact support was overcome diffraction limit, wherein the light spot size can not be less than half of its wavelength.

The new method is still subject to the law of Ernst Abbe (discovered this same diffraction limit), but the partial blockage of the beam (red) cut it to nine nanometers. Thanks to this support can be written almost a petabyte of data.

Open to the possibility, I think, it is not necessary to describe.
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