Colloquium

  • Light scattering properties of wavelength-scale nanostructures

  • Speaker : 서민교/ Min-Kyo Seo
    Affiliation : Department of Physics, KAIST
    Date : May 16, 2018 4:00 PM
    Place : Building 110 Room N103
    Contact : minkyo_seo@kaist.ac.kr
    Host : 정준우 / Joonwoo Jeong
  • Abstract

  • Optical resonances of metallic or dielectric nanostructures enable to effectively convert free-propagating electromagnetic waves to localized electromagnetic fields and vice versa. Plasmonic resonances of metal nanostructures extremely modify the local density of optical states beyond the optical diffraction limit and thus facilitate highly-efficient light-emitting, nonlinear signal conversion, photovoltaics, and optical trapping. The leaky-mode resonances, or termed Mie resonances, allow dielectric nanostructures to have a compact size even less than the wavelength scale. The dielectric nanostructures exhibiting low optical losses and supporting both electric and magnetic resonances provide an alternative to their metallic counterparts. To extend the utility of metal and dielectric nanostructures in further applications, e.g. metasurfaces and metamaterials, it is required to understand and engineer their scattering characteristics. In this seminar, experimental and theoretical investigation of the light scattering properties of wavelength-scale metal and dielectric nanorod structures will be presented.