DataVXApplied SciencesPaper
journal article·2024-10-24Open access

Application of Photo-Induced Chirality in Covert Authentication

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

Applied Sciences· Volume 14· Issue 21
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Source abstract

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.
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Research context

OpenAlex topics: Digital Media Forensic Detection · Advanced Steganography and Watermarking Techniques · Biometric Identification and Security

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Affiliations

Kennedy Institute of Rheumatology, Old Road Campus, University of Oxford, Roosevelt Dr, Oxford OX3 7FY, UK

Department of Materials, University of Oxford, Parks Road, Oxford OX1 3PH, UK

Clarendon Laboratory, Department of Physics, University of Oxford, Parks Road, Oxford OX1 3PU, UK

Department of Engineering Sciences, University of Oxford, Parks Road, Oxford OX1 3PJ, UK

Optoelectronics Research Centre, University of Southampton, Southampton SO17 1BJ, UK

Diamond Light Source, Harwell Science and Innovation Campus, Oxfordshire OX11 0DE, UK

Funding

EPSRC

References (11)

Show source-provided references
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