Asymmetric Metasurfaces with High- Q Resonances Governed by Bound States in the Continuum
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Koshelev, Kirill
Lepeshov, Sergey I
Liu, Mingkai
Bogdanov, Andrey
Kivshar, Yuri
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American Physical Society
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Wereveal that metasurfacescreated by seemingly different lattices of (dielectricor 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 periodicstructures anddemonstratealinkbetween thebound statesinthecontinuum andFanoresonances. Our results suggest the way for smart engineering of resonances in metasurfaces for many applications in nanophotonics and metaoptics.
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Physical Review Letters
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