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New light technique could revolutionise non-invasive medical diagnostics Orbital Angular Momentum could be harnessed to improve imaging and data transmission through biological tissues Could eventually have potential to make procedures such as surgery or biopsies unnecessary. An Aston University researcher has developed a new technique using light which could revolutionise non-invasive medical diagnostics and optical communication. The research showcases how a type of light called the Orbital Angular Momentum (OAM) can be harnessed to improve imaging and data transmission through skin and other biological tissues. A team led by Professor Igor Meglinski found that OAM light has unmatched sensitivity and accuracy that could result in making procedures such as surgery or biopsies unnecessary. In addition it could enable doctors to track the progression of diseases and plan appropriate treatment options. OAM is defined as a type of structured light beams, which are light fields which have a tailored spatial structure. Often referred to as vortex beams, they have previously been applied to a number of developments in different applications including astronomy, microscopy, imaging, metrology, sensing, and optical communications. Professor Meglinski in collaboration with researchers from the University of Oulu, Finland conducted the research which is detailed in the paper “Phase preservation of orbital angular momentum of light in multiple scattering environment” which is published in the Nature journal Light Science & Application. The paper has since been named as one of the year’s most exciting pieces of research by international optics and photonics membership organisation, Optica. The study reveals that OAM retains its phase characteristics even when passing through highly scattering media, unlike regular light signals. This means it can detect extremely small changes with an accuracy of up to 0.000001 on the refractive index, far surpassing the capabilities of many current diagnostic technologies. Professor Meglinski who is based at Aston Institute of Photonic Technologies said: “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 series of controlled experiments, transmitting OAM beams through media with varying levels of turbidity and refractive indices. They used advanced detection techniques, including interferometry and digital holography, to capture and analyse the light's behaviour. They found that the consistency between experimental results and theoretical models highlighted the ability of the OAM-based approach. The researchers believe that their study’s findings pave the way for a range of transformative applications. By adjusting the initial phase of OAM light, they believe that revolutionary advancements in fields such as secure optical communication systems and advanced biomedical imaging will be possible in the future. 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.” ENDS https://www.nature.com/articles/s41377-024-01562-7 Light: Science & Applications volume 13, Article number: 214 (2024) August 2024 https://doi.org/10.1038/s41377-024-01562-7 Authors: Igor Meglinski, Ivan Lopushenko, Anton Sdobnov & Alexander Bykov About Aston University For over a century, Aston University’s enduring purpose has been to make our world a better place through education, research and innovation, by enabling our students to succeed in work and life, and by supporting our communities to thrive economically, socially and culturally. Aston University’s history has been intertwined with the history of Birmingham, a remarkable city that once was the heartland of the Industrial Revolution and the manufacturing powerhouse of the world. Born out of the First Industrial Revolution, Aston University has a proud and distinct heritage dating back to our formation as the School of Metallurgy in 1875, the first UK College of Technology in 1951, gaining university status by Royal Charter in 1966, and becoming The Guardian University of the Year in 2020. Building on our outstanding past, we are now defining our place and role in the Fourth Industrial Revolution (and beyond) within a rapidly changing world. For media inquiries in relation to this release, contact Nicola Jones, Press and Communications Manager, on (+44) 7825 342091 or email: n.jones6@aston.ac.uk
Aston University scientist to help make crop monitoring easier and cheaper
Photonics expert Dr Sergey Sergeyev to help make crop monitoring easier and cheaper with remote sensing The technology can be placed on drones and flown over crop fields to provide real-time information about crop health Remote sensing is an essential tool to provide real-time information about crops to estimate yields. An Aston University photonics expert has received a Royal Society Industry Fellowship grant to help make crop monitoring easier and cheaper with remote sensing technology. Dr Sergey Sergeyev of Aston Institute of Photonic Technologies (AIPT) has received £174,000 to improve polarimetric LIDAR, a technology that uses light to remotely observe plants. LiDAR, an acronym for Light Detection and Ranging, involves light sent from a transmitter which is reflected from objects. Devices with this technology can be placed on drones and flown over crop fields to provide real-time information about crop health to help farmers forecast the success of their crops. Polarimetric synthetic-aperture radars (SARs) and polarimetric LiDARs are the most advanced, cost-effective sensors for crop monitoring. They are often used onboard aircraft and satellites and have been in use for three decades. However, current polarimetric LIDAR systems have low spatial resolution, a slow measurement speed and use expensive components that limit their cost effectiveness. Dr Sergeyev will be working in collaboration with Salford-based digital and AI farming company Fotenix to meet farmers' need for a cost-effective solution to check if their plants are adequately watered and disease-free. The team will aim to advance recently patented AIPT technology of the polarimetric LIDAR, making it affordable for farmers in the UK and worldwide. The project, called POLIDAR, will run from 2024 to 2025. Dr Sergeyev said: “Aston University’s patented technique will be modified by using a laser emitting four time-delayed pulse trains with different states of polarisation. By comparing the input states of polarisation and states of polarisation of light reflected from plants, it will reveal information about the distance to plants and plants' leaf texture, such as water stress and pathogen infection. Unlike state-of-the-art solutions we suggest an all-fibre design with a minimum number of bulk components that reduces the footprint, cost and weight. Dr Sergeyev added: “My project's motivation is driven by the global and UK agenda on increased food production, requiring novel remote sensing approaches towards ICT farming. “As declared at the World Summit on Food Security in 2017, the growth in the world's population requires increased and more efficient agricultural production. “Remote sensing is an essential tool to systematically address the challenging task of enhanced agricultural efficiency by providing real-time information about crop traits for yield estimation.” The announcement coincides with UNESCO Day of Light which marks the role light plays in science, culture and art, education and sustainable development. It is held on 16 May every year, the anniversary of the first successful operation of a laser. ENDS World Summit on Food Security in 2017 The future of food and agriculture: Trends and challenges (fao.org) https://www.fao.org/3/i6583e/i6583e.pdf UNESCO Day of Light The International Day of Light is a global initiative that provides an annual focal point for the continued appreciation of light and the role it plays in science, culture and art, education, and sustainable development, and in fields as diverse as medicine, communications, and energy. The broad theme of light will allow many different sectors of society worldwide to participate in activities that demonstrates how science, technology, art and culture can help achieve the goals of UNESCO – education, equality, and peace. The International Day of Light is held on May 16th every year, the anniversary of the first successful operation of the laser in 1960 by physicist and engineer, Theodore Maiman. The laser is a perfect example of how a scientific discovery can yield revolutionary benefits to society in communications, healthcare and many other fields. About Aston University For over a century, Aston University’s enduring purpose has been to make our world a better place through education, research and innovation, by enabling our students to succeed in work and life, and by supporting our communities to thrive economically, socially and culturally. Aston University’s history has been intertwined with the history of Birmingham, a remarkable city that once was the heartland of the Industrial Revolution and the manufacturing powerhouse of the world. Born out of the First Industrial Revolution, Aston University has a proud and distinct heritage dating back to our formation as the School of Metallurgy in 1875, the first UK College of Technology in 1951, gaining university status by Royal Charter in 1966, and becoming The Guardian University of the Year in 2020. Building on our outstanding past, we are now defining our place and role in the Fourth Industrial Revolution (and beyond) within a rapidly changing world. For media inquiries in relation to this release, contact Nicola Jones, Press and Communications Manager, on (+44) 7825 342091 or email: n.jones6@aston.ac.uk
Reinventing the laser diode: free public lecture by Professor Richard Hogg
Professor Richard Hogg joined Aston University in spring 2023 His inaugural lecture is about laser diodes, the tiny components that are a vital part of everyday life The free event will take place on Tuesday 28 November. The latest inaugural lecture at Aston University will explore the laser diode and what’s in store for it in the future. Professor Richard Hogg will explain how his future research might make laser diodes do some of the things that they currently can’t do. The laser diode turned 61 years old this month and the tiny components are a critical part of everyday life. Professor Hogg said: “They are now at the heart of the continuous transformation of society. “They transmit data to allow instantaneous, ubiquitous communication and data access. “They allow light to be used for cutting and welding, for sensing and imaging, for displays and illumination, and data storage. “And in the guise of a laser pointer they can even be used to entertain your cat!” He will discuss different classes of laser diode and their operation and applications. Professor Hogg joined Aston University in spring 2023 and is based at Aston Institute of Photonic Technologies (AIPT). It is one of the world’s leading photonics research centres and its scientific achievements range from medical lasers and bio-sensing for healthcare, to the high-speed optical communications technology that underpins the internet and the digital economy. The professor is also chief technology officer at III-V Epi, which provides compound semiconductor wafer foundry services. The free event will take place on the University campus at Conference Aston, on Tuesday 28 November from 6pm to 8pm and will be followed by a drinks reception. It can also be viewed online. To sign up for a place in person visit https://www.eventbrite.co.uk/e/717822585677?aff=oddtdtcreator To sign up for a place online visit https://www.eventbrite.co.uk/e/717824260687?aff=oddtdtcreator
Aston University professor elected Fellow of Royal Microscopical Society
Professor Igor Meglinski is a physicist, scientist and biomedical engineer He pioneered the application of circularly polarised light for cancer detection His research is at the interface of physics, optics and imaging modalities. Igor Meglinski, professor of mechanical, biomedical and design engineering in the College of Engineering and Physical Sciences at Aston University, has been elected as a Fellow of the Royal Microscopical Society (RMS). Professor Meglinski is a physicist, scientist, and biomedical engineer whose research interests are at the interface between modern physics, optics and imaging modalities, focusing on the exploration of novel photonics-based phenomena and their implementation to practical applications in medicine, biology, life sciences and health care industries. Among other achievements, Professor Meglinski pioneered the application of circularly polarised light for cancer detection. best known for his development of fundamental studies and translation research dedicated to imaging of cells and biological tissues utilising polarised light, dynamic light scattering and computational imitation of light propagation within complex tissue-like scattering medium. His current research projects include the application of coherent polarised light for cancer diagnosis, functional imaging of blood and lymph flows, neuroimaging and brain malformation studies. He is also exploring human visual perception of polarised light and helical wave fronts, the fundamentals of shaped light with orbital angular momentum and quantum entanglements transfer in turbid tissue-like scattering medium, screening of cells, cell’s organelles and cells interaction. He has authored and co-authored more than 400 scientific papers and presented over 800 presentations at major international conferences in the field, including over 200 keynote and plenary talks and invited lectures. The Royal Microscopical Society is a learned society dedicated to the promotion and development of microscopy and imaging. Its members come from a wide range of backgrounds, including undergraduates, research students, users of microscopy in industry and academia, microscopy manufacturers and suppliers and research leaders in their various fields within the biological and physical sciences. Professor Igor Meglinski said: “I was delighted to be invited to become a Fellow of the Royal Microscopical Society. “It is always a pleasure to be recognised for your work, such as my recent research which could provide a more accurate method of blood flow diagnosis in skin to help people with diabetes.”
Aston University photonics expert elected as Fellow of Optica
• Professor Edik Rafailov is head of the Optoelectronics and Biomedical Photonics Research Group • He is a member of Aston Institute of Photonic Technologies, a world-leading photonics research centre • Optica is the leading organisation for researchers and others interested in the science of light. A photonics expert at Aston University has been elected as a Fellow of Optica (formerly OSA), Advancing Optics and Photonics Worldwide. Professor Edik Rafailov is head of the Optoelectronics and Biomedical Photonics Research Group in the College of Engineering and Physical Sciences at Aston University and a member of Aston Institute of Photonic Technologies (AIPT), one of the world’s leading photonics research centres. He was elected for his ‘contributions to novel gain media for semiconductor lasers at wavelengths from 750nanometres to1300nanometres’. Optica is the society dedicated to promoting the generation, application, archiving and dissemination of knowledge in the field of photonics. Founded in 1916, it is the leading organisation for scientists, engineers, business professionals, students and others interested in the science of light. Fellows are selected based on several factors, including outstanding contributions to business, education, research, engineering and service to Optica and its community. Satoshi Kawata, 2022 Optica president, said: “I am pleased to welcome the new Optica Fellows. These members join a distinguished group of leaders who are helping to advance the field optics and photonics. Congratulations to the 2023 Class.” Director of AIPT, Professor Sergei Turitsyn said: “I am delighted that Edik has received this prestigious fellowship. “AIPT has one more Optica Fellow, that is a high honour in the field of photonics. “Edik joined Aston University in 2014 and since then his research has contributed to the Institute’s world-leading position in the fields of fibre and semiconductor lasers and bio-medical photonics, making impact on industry, scientific communities and society.” Fellows are Optica members who have served with distinction in the advancement of optics and photonics. As they can account for no more than 10 percent of the total membership, the election process is highly competitive. Candidates are recommended by the Fellow Members Committee and approved by the Awards Council and Board of Directors. The new Optica Fellows will be honoured at the Society’s conferences and events throughout 2023.
