Chinese researchers have achieved a groundbreaking milestone in optical data storage (ODS), reaching a storage capacity of 1.6 petabits on a DVD-sized disk. In data storage units, 1,024 gigabytes equal 1 terabyte, and 1,024 terabytes form 1 petabit. (CGTN)
A research group led by Prof. WANG Yuansheng and Prof. LIN Hang from Fujian Institute of Research on the Structure of Matter and the collaborators developed a new kind of ODS medium, PSL transparent glass ceramic, via in situ precipitation of PSL LiGa5O8: Mn2+ nanocrystals (NCs, 2-7 nm) from a glass matrix.
A three-dimensional nanoscale optical disk memory with petabit capacity has been developed at the Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, according to an article published on Feb. 22 in Nature. The research team managed to increase the capacity of optical data storage to the petabit level by extending the planar recording architecture to three dimensions with hundreds of layers, while also breaking the optical diffraction limit barrier of the recorded spots. The minimum spot size and lateral track pitch are 54 nm and 70 nm, respectively.
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