Led by Professor Igor Meglinski, the research demonstrates how OAM light can penetrate skin and biological tissues with unprecedented sensitivity and accuracy, offering the potential to replace traditional diagnostic methods like biopsies and invasive surgeries. This method could also enable real-time disease monitoring and support more effective treatment planning.

OAM light, a type of structured light beam or "vortex beam," has previously been utilized in astronomy, microscopy, and sensing. This latest study, conducted in partnership with the University of Oulu in Finland, is detailed in the paper "Phase preservation of orbital angular momentum of light in multiple scattering environment" published in *Light: Science and Applications*. The study has garnered significant recognition from Optica, an international optics and photonics association, which named it one of the year's standout research developments.

According to the study, OAM light maintains its phase characteristics even when passing through complex scattering environments, unlike conventional light signals. This feature allows it to detect minimal changes in the refractive index with an accuracy reaching 0.000001, greatly surpassing current diagnostic tools' precision.

Professor Meglinski, based at the Aston Institute of Photonic Technologies, noted the breakthrough's medical implications: "By showing that OAM light can travel through turbid or cloudy and scattering media, the study opens up new possibilities for advanced biomedical applications. For example, this technology could lead to more accurate and non-invasive ways to monitor blood glucose levels, providing an easier and less painful method for people with diabetes."

The research team conducted a variety of controlled experiments, directing OAM beams through media with differing turbidity levels and refractive indices. Using techniques such as interferometry and digital holography, they closely observed the behavior of the light, which consistently matched theoretical predictions, showcasing the reliability of this OAM-based approach.

The study's findings suggest significant potential for the future of biomedical imaging and secure optical communications. Researchers believe that by modifying the initial phase of OAM light, advances in these fields could be achieved.

Professor Meglinski added: "The potential for precise, non-invasive transcutaneous glucose monitoring represents a significant leap forward in medical diagnostics. My team's methodological framework and experimental validations provide a comprehensive understanding of how OAM light interacts with complex scattering environments, reinforcing its potential as a versatile technology for future optical sensing and imaging challenges."

Research Report:Phase preservation of orbital angular momentum of light in multiple scattering environment

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Aston University
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