In this work, we delve into the engineering of multipole resonances within subwavelength nanoantennas, targeting nanophotonic applications across the visible and near-infrared spectral regions. Through tailoring of nanoantenna dimensions, shapes, and compositions, intricate resonant phenomena are induced, facilitating the confinement and manipulation of electromagnetic fields at subwavelength scales. The careful selection of dielectric materials, characterized by minimal optical losses, is harnessed in the design of nanoantennas with high-refractive-index dielectrics. These nanostructures support both electric and magnetic multipole resonances. Crucially, the inherent tunability of these resonances enables us to exert fine-grained control over scattering properties, yielding directed scattering responses. By introducing notable refractive index differences, we design nanostructures with the excitation of multipole resonances, thus engineering their controlled interplay. This manifests as a distinctive unidirectional scattering pattern, showing its applications in diverse domains, including sensing, imaging, and communication. Our results highlight the transformative potential of manipulating multipole resonances, emphasizing the important paradigm shift in optical technologies.

Biography:

Viktoriia Babicheva is an Asst. Prof. in the Department of Electrical and Computer Engineering at the University of New Mexico. Dr. Babicheva joined UNM after her postdoctoral appointment in the College of Optical Sciences at the University of Arizona, Tucson. Before that, Dr. Babicheva worked at the Birck Nanotechnology Center at Purdue University and Center for Nano-Optics at Georgia State University. Dr. Babicheva’s research focus is nanophotonics, nano-optics, and photonic materials, and the work specialization is localized and delocalized nanoparticle resonances in arrays, hyperbolic metamaterials, and near-field optical imaging of layered materials. Dr. Babicheva is the author and co-author of more than 65 peer-reviewed journal articles, 60 conference publications, two book chapters, and one book. Dr. Babicheva has served as an Associate Editor for MRS Advances since 2021.