Reaching the superscattering regime with BIC physics
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Canós Valero, Adrià
Shamkhi, Hadi K.
Kupriianov, Anton S.
Tuz, Vladimir R.
Bobrovs, Vjaceslavs
Kivshar, Yuri S.
Shalin, Alexander S.
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We uncover a novel mechanism of superscattering from subwavelength resonators linked to the physics of bound states in the continuum (BICs). Enhanced scattering occurs due to constructive interference within the Friedrich-Wintgen mechanism of interfering resonances. Through this process, the scattering cross section of a single resonance can exceed the currently established limit. We develop a general non-Hermitian model to describe interfering resonances of quasi-normal modes, and study subwavelength dielectric nonspherical resonators exhibiting avoided crossing resonances and quasi-BIC states. Our results reveal novel physics of non-Hermitian systems suggesting important applications for metadevices.
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Journal of Physics: Conference Series
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