High-Q transparency band in all-dielectric metasurfaces induced by a quasi bound state in the continuum
Diego R. Abujetas,
Angela Barreda,
Fernando Moreno
et al.
Abstract:Bound states in the continuum (BICs) emerge throughout Physics as leaky/resonant modes that remain however highly localized. They have attracted much attention in Optics and Photonics, and especially in metasurfaces, i.e. planar arrays of sub-wavelength meta-atoms. One of their most outstanding feature is the arbitrarily large Q-factors they induce upon approaching the BIC condition, which we exploit here to achieve a narrow transparency band. We first show how to shift a canonical BIC in an all-dielectric met… Show more
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