Application of Photo-Induced Chirality in Covert Authentication

被引：0

作者：

Borisenko, Konstantin B. ^{[1
,2
]}

Shanmugam, Janaki ^{[2
]}

Luers, Andrew ^{[3
]}

Ewart, Paul ^{[3
]}

Williams, Benjamin A. O. ^{[4
]}

Hewak, Daniel W. ^{[5
]}

Hussain, Rohanah ^{[6
]}

Javorfi, Tamas ^{[6
]}

Siligardi, Giuliano ^{[6
]}

Kirkland, Angus I. ^{[2
]}

机构：

[1] Univ Oxford, Kennedy Inst Rheumatol, Old Rd Campus, Roosevelt Dr, Oxford OX3 7FY, England

[2] Univ Oxford, Dept Mat, Parks Rd, Oxford OX1 3PH, England

[3] Univ Oxford, Dept Phys, Clarendon Lab, Parks Rd, Oxford OX1 3PU, England

[4] Univ Oxford, Dept Engn Sci, Parks Rd, Oxford OX1 3PJ, England

[5] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, England

[6] Harwell Sci & Innovat Campus, Diamond Light Source, Didcot OX11 0DE, Oxon, England

来源：

APPLIED SCIENCES-BASEL | 2024年 / 14卷 / 21期

基金：

英国工程与自然科学研究理事会;

关键词：

authentication labels; chirality; polarization; circular dichroism;

D O I：

10.3390/app14219743

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Featured Application Photo-induced chirality in thin films of Ge2Sb2Te5 can be used to store covert information with application in authentication labels. This information can be revealed by a suitable simple reading device.Abstract 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.

引用

页数：7

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