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Chirality discrimination is of fundamental interest in biology, chemistry, and metamaterial studies. To recognize the handedness of chiral objects we need enantioselective fields. These are probing twisted fields. In this lecture, we give a brief overview of the electromagnetic methods applied for chirality discrimination. We show that the methods used for chirality discrimination in optics and microwaves are quite different. In optics, near-field plasmon-resonance spectroscopy with superchiral probing fields is effectively applicable for analyses of large biomolecules with chiral properties. We show possibility for microwave near-field chirality discrimination analysis based on magnon-resonance spectroscopy. Newly developed capabilities in microwave sensing using magnetoelectric (ME) probing fields originated from multiresonance magnetic-dipolar-mode (MDM) oscillations in quasi-2D yttrium-iron-garnet disks provide potential for unprecedented measurements of chemical and biological objects.
In a quasi-2D ferrite disk placed in a microwave cavity, one observes quantum confinement effects of MDM oscillations. At the MDM resonances, transfer between angular momenta in the magnetic insulator and in the vacuum cavity, demonstrates generation of vortex flows with fixed handedness. In the magnon-polariton structure, this leads to the appearance of curved wavefronts of electromagnetic radiation. This phenomenon open perspective for new basic and applied research.
Dr. EUGENE O. KAMENETSKII received PhD degree in Physics and Mathematics from the Electrical Engineering Institute, Leningrad, former Soviet Union. He is presently with School of Electrical and Computer Engineering, Ben Gurion University of Negev, Israel. He is an author of 200 refereed journal and conference papers. He was an editor of 3 books: "Electromagnetic, magnetostatic, and exchange-interaction vortices in confined magnetic structures", Research Signpost Publisher (2008), “Fano Resonances in Optics and Microwaves”, Springer (2018), and ”Chirality, magnetism, and magnetoelectricity: Separate phenomena and joint effects in metamaterial structures”, Springer (2021). He is a Fellow of the Electromagnetics Academy (USA) since 2007.
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