Reversible decryption of covert nanometer-thick patterns in modular metamaterials.
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DOI: 10.1364/ol.44.004507
Abstract: Continuous development of security features is mandatory for the fight against forgery of valuable documents and products, the most notable example being banknotes. Such features demonstrate specific properties under certain stimuli such as fluorescent patterns… read more here.
Keywords: security features; decryption covert; nanometer thick; modular metamaterials ... See more keywords