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Researchers Deploy Metasurface Tech to Design of Encryption Devices

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Researchers from the University of St. Andrews in Scotland have developed a metasurface-based device that produces multiple distinct holographic images depending on the surrounding medium and the wavelength of light used. The ability to store information that is only retrievable with the right set of keys — such as a certain light wavelength combined with wet conditions — could be further developed to design simple yet effective encryption devices. The device demonstrated by the researchers revealed a holographic butterfly with 705-nm light in dry conditions, and a...Read full article

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    Published: May 2022
    Glossary
    meta-optics
    Meta-optics, also known as metasurface optics or flat optics, is a branch of optics that involves the design, fabrication, and utilization of artificial structures called metasurfaces to control and manipulate light at the nanoscale level. Unlike traditional optics, which typically involve bulky lenses and mirrors, meta-optics aims to achieve similar functionalities using ultrathin, planar structures composed of subwavelength nanostructures. Metasurfaces are typically composed of arrays of...
    metasurfaces
    Metasurfaces are two-dimensional arrays of subwavelength-scale artificial structures, often referred to as meta-atoms or meta-elements, arranged in a specific pattern to manipulate the propagation of light or other electromagnetic waves at subwavelength scales. These structures can control the phase, amplitude, and polarization of incident light across a planar surface, enabling unprecedented control over the wavefront of light. Key features and characteristics of metasurfaces include: ...
    Opticsmeta-opticsmetasurfacesmetastructuresResearch & TechnologyeducationEuropeUniversity of St. Andrewsholographicholographic metasurfacesBiophotonicsmedicalencryptionsensingoptical encryptionTechnology News

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