Transformation of Data Encoding through Chiral Metasurfaces
In a groundbreaking development, scientists have created a chiral metasurface encoding technique that could revolutionise various industries, from data encryption and anticounterfeiting to biosensing and quantum technologies.
The technology, developed by researchers at EPFL, ANU, and the University of South Australia, is based on the manipulation of meta-atoms, the building blocks of metamaterials, to control the interaction with polarized light. This innovative approach allows for precise control over the orientation of molecules, a concept known as chirality.
Chirality, which refers to the orientation of a molecule, despite it being identical in composition and structure to another, plays a fundamental role in biology. In nature, "right-handed" DNA molecules, sugar, and amino acids have been exclusively selected by natural selection. This new technology could be used to distinguish between left- and right-handed biomolecules, opening up possibilities for advanced biosensing, especially in drug analysis.
Coherent, Inc. (COHR), a leader in laser technology resulting from the merger of advanced material II-VI Marlow with laser maker Coherent, could potentially benefit from this development. The technology can be used to create sensors sensitive to chiral structures, offering potential applications in fields requiring controlled light manipulation and chiral discrimination.
The chiral metasurface encoding technique has several potential real-world applications. In secure data encryption, the metasurface can encode dual images, with one image visible under unpolarized light and another revealed only by circularly polarized light, enabling advanced anticounterfeiting and watermarking for security purposes.
In the realm of anticounterfeiting and camouflage, the technology allows invisible “watermark” layers that can authenticate products or documents, enhancing security against forgery and enabling camouflage applications.
In biosensing and pharmaceutical analysis, since biological molecules are chiral, the metasurface’s ability to map chiral responses can be used to detect drug composition or purity from small samples, distinguishing medicines from toxins based on their molecular handedness.
Quantum technologies also stand to benefit from this innovation. Polarized light is critical in many quantum computing and photonics applications. This chiral metasurface offers precise control over polarized light interactions, potentially supporting quantum information processing.
The technology also has potential applications in photonics and computing, including photonic computing, quantum cryptography, and security and camouflage. Invisible patterns revealed only under polarized light could be used for military-grade concealment and identification systems.
Moreover, the system can be tuned along a gradient, allowing for scalable sensing of chiral molecules. As a proof-of-concept, the researchers created an image with two layers of data encoded by a metasurface, one with normal light and one with polarized light.
Coherent derives 29% of its revenues from lasers directly, with the rest linked to associated equipment like optical fiber and electronics. The unique encoding using this chiral toolkit could certify the authenticity of bank notes, ID cards, payment systems, and other identification systems.
The researchers have developed 2D lattices composed of tiny elements (meta-atoms) that can easily tune their chiral properties. By varying the orientation of meta-atoms within a lattice, scientists can control the resulting metasurface's interaction with polarized light.
Scientists have been developing metamaterials for a few decades, materials that derive new properties not found in nature. This chiral metasurface encoding technique represents a significant leap forward in this field, offering a universal toolkit for on-demand chiral design. The researchers have produced a predictable chiral behavior, tunable by simple parameters, creating a powerful tool for various industries.
The innovation in science, a chiral metasurface encoding technique, could be utilized in the field of technology for creating sensors sensitive to chiral structures, potentially benefiting companies like Coherent, a leader in laser technology. This technology, when employed in quantum computing and photonics applications, could provide precise control over polarized light interactions, which is crucial in many quantum information processing tasks.
