this post was submitted on 02 Dec 2023
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Say, 8 Tbits/cm² (so 1 TB/cm²) ...
this is aprox ( 10^-7^m )^2^ unit cells.
Conventional optical microscopy cannot resolve this, so, maybe they are using evanescent surface optics ?
I think it's 3dimensional not 2
This would absolutely make sense. Unfortunately, they don't say whether or not (it's 3D) in the article. Well ... they do describe it as a microscopic QR code which is 2D.