Special Presentation: Viktoriia Babicheva

    Date: 
    Friday, February 2, 2018 - 10:00am
    Location: 
    Franken Conference Room (Meinel 821)
    Description: 

    Novel Material Platforms for Metasurfaces and Metaphotonic Devices

    Abstract(s): 

    Optical metamaterials are three-dimensional structures with rationally designed building blocks that enable devices with distinct optical responses not attainable with naturally available materials. Comprising a class of metamaterials with a reduced dimensionality, optical metasurfaces allow the miniaturization of conventional refractive optics into planar structures, and a novel planar technology is expected to provide enhanced functionality for photonic devices being distinctly different from those observed in the three-dimensional case. 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. I will present the results on antireflective properties of metasurfaces based on high-index nanoparticle arrays and explain how zero backscattering from the highly reflective substrate can be achieved [1]. Scattering-type scanning near-field optical microscope (s-SNOM) provides optical, chemical, and structural information of metasurfaces and enables their imaging with nanoscale resolution. I will show an approach to analyze layered of materials with different permittivities and demonstrate a technique to identify material type based on near fields at sample edges [2]. The recent discovery of high-index materials that offer low loss and tunability in their optical properties as well as complementary metal-oxide-semiconductor (CMOS) compatibility can enable a breakthrough in the field of nanophotonics, optical metamaterials, and their applications.

    [1] V.E. Babicheva and A.B. Evlyukhin, "Resonant Lattice Kerker Effect in Metasurfaces with Electric and Magnetic Optical Responses," Laser & Photonics Reviews 11, 1700132 (2017).

    [2] Y. Abate, S. Gamage, L. Zhen, S.B. Cronin, H. Wang, V. Babicheva, M.H. Javani, M.I. Stockman, “Nanoscopy reveals surface-metallic black phosphorus,” Light: Science & Applications 5, e16162 (2016).

    Speaker Bio(s): 

    Viktoriia Babicheva received her B.S. and M.S. degrees in Physics from Moscow Institute of Physics and Technology, Russia. As a Ph.D. student at the Technical University of Denmark, she studied plasmonic waveguides and modulators as well as novel plasmonic materials and received her Ph.D. degree in Photonics Engineering in 2013. Since that, she has been working at Purdue and Georgia State Universities with the main focus on localized and delocalized nanoparticle resonances in periodic arrays, hyperbolic metamaterials, and near-field imaging of nanolayered materials. Currently, she is a postdoc at College of Optical Sciences, University of Arizona.