A company claims to have developed a technique to increase the capacity of DVD's from 4.7 GB up to a whopping 1,000 TB (1 petabyte). The article goes into a lot of detail on how it works, including the basics of optical disk burning.
They claim to have circumnavigated Abbe's limit - a law that limits the width of light beams.
"Both beams must abide by Abbe’s law, so they cannot produce smaller dots individually. But we gave the two beams different functions:"
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