Maybe everyone is relatively unfamiliar with the CD. That one is flashing with the memory of many people.The data of a disc is between 0.3 ~ 2GB.
Although peoples use of discs has greatly reduced the disclosure, scientists have not stopped the development of their storage capacity.According to "CCTV News" reported on February 22, a research team established by the Shanghai Institute of Optical and Precision Machinery of the Chinese Academy of Sciences and the research units of Shanghai Institute of Technology created a "super CD".quantity.
The main participants of this research, Ruan Hao, a researcher at Shanghai Guangji Institute, said the team used the international first double light beam regulation to gather induced luminous lightUltra -different light storage technology, for the first time in information writing and reading, all broke the limitation of the diffraction limit. In this case that looks like a glass -like transparent disc, a point size is 54nm and the road spacing is 70nm super -resolution data storage, And completed the 100 -layer multi -layer data record, its single disk equivalent capacity reaches PB level, and the data bearing capacity can reach about 1.6PB.
What is the concept of 1.6pb?It is clear that the unit is converted. 1pb = 1024TB, 1TB = 1024GB, that is, 1pb = 1048576GB, this super CD 1.6PB data capacity is 1.68 million GB.
Do you dare to think?A CD can store 1.68 million GB data, and even put all the books of a national library in it.
The development of society and the advancement of science and technology have spawned a large amount of data.The data carrier must develop in the direction of high storage reserves. At present, the storage methods used by humans include magnetic storage, optical storage and semiconductor storage.CD storage mode is optical storage. This storage technology has the characteristics of green energy saving, safe and reliable, long storage time, etc. It can retain data for 50-100 years, so it is suitable for long-term low-cost storage of massive data.
But we all know that the storage volume of the early disc is not so large.The storage volume of the super CD -ROM has almost 1 million times, or a super CD is equivalent to the storage capacity of ordinary discs before 1 million. Why do you have such great progress?
This is because Chinese scientists have broken through the production of this super CD for 7 years.The diffraction limit limit has greatly reduced the size of the storage information point, thereby improving the capacity of a single disk storage, and this is the first time that the world has achieved PBweight Optical storage for the first time.Related papers have been published on February 22 in the magazine of Nature.
This super CD has achieved 54nm point size, 70nm aisle spacing is super resolved data storage, and it is less than one millimeter thickness.The multi -layer stereo data record mode of the upper and lower levels is achieved. Compared with the previous ordinary CD -ROM, the storage capacity has been greatly increased, and one million is truly one million!
Source: "Surging News" reported on February 22 that "Chinese scientists lasted for 7 years to develop" Super 7 years."CD", the world for the first time to achieve PB Overweight Storage "
