“Asymmetric Metasurfaces with High- Q Resonances Governed by Bound States in the Continuum” (2018), by Kirill Koshelev et al. Materials Science research paper. Original abstract below, unchanged. A free PDF is available.

Asymmetric Metasurfaces with High- Q Resonances Governed by Bound States in the Continuum

Kirill Koshelev, Sergey Lepeshov, Mingkai Liu et al. · November 9, 2018 · Materials Science

Abstract

We reveal that metasurfaces created by seemingly different lattices of (dielectric or metallic) meta-atoms with broken in-plane symmetry can support sharp high-Q resonances arising from a distortion of symmetry-protected bound states in the continuum. We develop a rigorous theory of such asymmetric periodic structures and demonstrate a link between the bound states in the continuum and Fano resonances. Our results suggest the way for smart engineering of resonances in metasurfaces for many applications in nanophotonics and metaoptics.

Free PDF DOI: 10.1103/physrevlett.121.193903