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

“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.

- Authors: Kirill Koshelev, Sergey Lepeshov, Mingkai Liu, Andrey Bogdanov, Yuri S. Kivshar
- Published: November 9, 2018
- Field: Materials Science
- DOI: https://doi.org/10.1103/physrevlett.121.193903
- Free PDF: https://arxiv.org/pdf/1809.00330

## 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.

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