Compact Disks make Comeback: Memory could Exceed Petabytes - YouTubeNot yet. It's from research in China. Writing on hundreds of layers on a disk. Lasers can focus and write at specific depths of the disk. Another laser will target the writes and cause them to emit light.
They didn't write about how slow writing is, nor how much energy it takes, nor where you get the laser to write like this.
#China #Technology
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