OSE Seminar by Dr. Viktoriia Babicheva on Lattice Effects in Plasmonic and van der Waals Metasurfaces
Posted: August 25, 2020
Date: Thursday, August 27, 2020
Time: 12:15 PM to 1:15 PM
Location: via Zoom
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The unique properties of the metal interfaces with nanoscale light confinement enable new and exciting opportunities for fundamental studies and practical applications. High field localization and strong enhancement in plasmonic nanostructures can enhance light-matter interaction and their nonlinear response. Optical metasurfaces allow the miniaturization of conventional refractive optics into planar structures, and novel planar technology is expected to provide enhanced functionality for photonic devices being distinctly different from those observed in the three-dimensional case. Transdimensional photonics has emerged as a new field of science and engineering that explores the optical properties of materials and nanostructures in the translational regime between two and three dimensions. In this talk, I will show that nanostructures made of high-index materials, such as silicon, transition metal dichalcogenides, or hexagonal boron nitride, support optically induced both electric and magnetic resonances in the visible and infrared spectral ranges. We designed scattering elements out of multi-segment metal-semiconductor nanostructures, and we studied periodic arrays of such scatterers. We aimed at designing efficient directional scatterers and their arrays for ultra-thin optical components, such as metasurfaces and transdimensional photonic lattices. I will present our result indicating that a slight mismatch in the resonance positions controlled by the scatterers’ size results in Rabi splitting, observed as changes in peak positions and characteristic asymmetric spectral profiles.
Viktoriia Babicheva is an Asst. Prof. in the Department of Electrical and Computer Engineering. Dr. Babicheva joined UNM after her postdoctoral work in the College of Optical Sciences at the University of Arizona, Tucson. Before that, Dr. Babicheva worked in 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 55 peer-reviewed journal articles, 35 conference publications, and one book chapter.