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The physics and technology of optical superoscillations

May 19, 2023 @ 11:30 am 12:30 pm

IQSE AMO QO Seminar Series

Pizza will be served for IQSE members at 11:00 am. The talk will start around 11:30 am.

Speaker: Dr. Nikolay I. Zheludev


ABOUT THE SPEAKER: Professor Nikolay Zheludev, PhD, DSc is a world leader in the field of nanophotonics and metamaterials. Professor Zheludev received MSc, PhD and DSc from Moscow State University. His international research careers continued at the University of Southampton in the UK were he became Deputy Director (Physics) of the world-famous Optoelectronics Research Centre and Director of the Centre for Photonic Metamaterials. At NTU Professor Zheludev is founding director of the Centre for Disruptive Photonic Technologies and co-director of The Photonics Institute. His awards include a Senior Leverhulme Research Fellow awarded by the Leverhulme Trust to “outstanding researchers”; a Senior Research Professorship of the Engineering and Physical Science Research Council, UK that is “awarded to outstanding academic scientists and engineers of international repute” and a Royal Society Wolfson Research Fellowship and Merit Award – given to “respected scientists of outstanding achievement and potential”.

EVENT DETAILS: Optical superoscillations are rapid, subwavelength spatial variations of the intensity and phase of light, occurring in complex electromagnetic fields formed by the interference of several coherent waves. The discovery of superoscillations stimulated a revision of the limits of classical electromagnetism — in particular, the studies of phenomena such as unlimitedly small energy hotspots, phase singularities, energy backflow, anomalously high wavevectors and their intriguing similarities to the evanescent plasmonic fields on metals. In recent years, the understanding of superoscillatory light has led to the development of superoscillatory lensing, imaging and metrology technologies. Dielectric, metallic and metamaterial nanostructured superoscillatory lenses have been introduced that are able to create hotspots smaller than allowed by conventional lenses. Far-field, label-free, non-intrusive deeply subwavelength super-resolution imaging and metrology techniques that exploit high light localization and rapid variation of phase in superoscillatory fields have also been developed, including new approaches based on artificial intelligence, that now reach the atomic scale resolution. We review the fundamental properties of superoscillatory optical fields and examine emerging technological applications.

ZOOM information:

Meeting ID: 981 5625 1523
Passcode: 297578

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