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Asymmetric metasurfaces with high-$Q$ resonances governed by bound states in the continuum

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 نشر من قبل Kirill L. Koshelev
 تاريخ النشر 2018
  مجال البحث فيزياء
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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 that originate from the physics of bound states in the continuum. We prove rigorously a direct link between the bound states in the continuum and the Fano resonances, and develop a general theory of such metasurfaces, suggesting the way for smart engineering of resonances for many applications in nanophotonics and meta-optics.



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