Reaching the Superscattering Regime with BIC Physics

Journal of Physics: Conference Series. Vol.2172: 4th International Smart NanoMaterials Conference 2021: Advances, Innovation and Applications (SNAIA 2021) 2022
A. Canos Valero, Hadi K. Shamkhi, Anton S. Kupriianov, Vladimir R. Tuz, Vjačeslavs Bobrovs, Yuri S. Kivshar, Aleksandr Shalin

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.

Atslēgas vārdi
superscattering regime, dipole
DOI
10.1088/1742-6596/2172/1/012003
Hipersaite
https://iopscience.iop.org/article/10.1088/1742-6596/2172/1/012003

Valero, A., Shamkhi, H., Kupriianov, A., Tuz, V., Bobrovs, V., Kivshar, Y., Shalin, A. Reaching the Superscattering Regime with BIC Physics. Journal of Physics: Conference Series, 2022, Vol. 2172, Article number 012003. ISSN 1742-6588. e-ISSN 1742-6596. Available from: doi:10.1088/1742-6596/2172/1/012003

Publikācijas valoda
English (en)