Application of Photo-Induced Chirality in Covert Authentication

Autor:	Konstantin B. Borisenko, Janaki Shanmugam, Andrew Luers, Paul Ewart, Benjamin A. O. Williams, Daniel W. Hewak, Rohanah Hussain, Tamás Jávorfi, Giuliano Siligardi, Angus I. Kirkland
Jazyk:	angličtina
Rok vydání:	2024
Předmět:	authentication labels chirality polarization circular dichroism Technology Engineering (General). Civil engineering (General) TA1-2040 Biology (General) QH301-705.5 Physics QC1-999 Chemistry QD1-999
Zdroj:	Applied Sciences, Vol 14, Iss 21, p 9743 (2024)
Druh dokumentu:	article
ISSN:	14219743 2076-3417
DOI:	10.3390/app14219743
Popis:	A new technology to write and read covert information in authentication labels is described. This technology uses the phenomenon of photo-induced chirality in Ge2Sb2Te5 thin films to encode the left- or right-circular or linear polarization of the laser beam used to write the label. The written polarization can be revealed by a simple reading device, which is demonstrated to provide the same qualitative information as reading based on cyclotron circular dichroism spectroscopy and imaging. The suggested method, while based on existing manufacturing approaches, offers a balance between technological complexity for writing and simplicity for reading, and may be advantageous as a new authentication technology.
Databáze:	Directory of Open Access Journals
Externí odkaz:	https://doaj.org/article/3956221a720d4301a1939fae28307f76 Zobrazit plný text záznamu View record in DOAJ