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Direct laser printing of high-resolution physically unclonable anti-counterfeit labels. (arXiv:2203.08471v1 [physics.optics])
March 17, 2022, 1:20 a.m. | Vasily Lapidas, Alexey Zhizhchenko, Eugeny Pustovalov, Dmitry Storozhenko, Aleksandr Kuchmizhak
cs.CR updates on arXiv.org arxiv.org
Security labels combining facile structural color readout and physically
unclonable one-way function (PUF) approach provide promising strategy for
fighting against forgery of marketable products. Here, we justify direct
femtosecond-laser printing, a simple and scalable technology, for fabrication
of high-resolution (12500 dots per inch) and durable PUF labels with a
substantially large encoding capacity of 10$^{895}$ and a simple
spectroscopy-free optical signal readout. The proposed tags are comprised of
laser-printed plasmonic nanostructures exhibiting unique light scattering
behavior and unclonable 3D geometry. …
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