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Chiral Quasi-Bound States in the Continuum by Overvig, Adam; Yu, Nanfang; Alu, Andrea is a scholarly article available to read on EtoBox.

What is Chiral Quasi-Bound States in the Continuum about?

Quasi-bound states in the continuum (q-BICs) are resonant states of suitably tailored nanostructures with long optical lifetimes controlled by symmetry-breaking perturbations. While in planarized ultrathin devices the resulting Fano resonance is limited to linear polarizations, we show here that chiral perturbations extend q-BIC concepts to arbitrary elliptical polarizations. Using geometric phase engineering, we realize metasurfaces with ultrasharp Fano spectral features that can shape the impinging wavefront with near-unity efficiency, while at the same time precisely filtering their spectral content.

Author

Overvig, Adam; Yu, Nanfang; Alu, Andrea

Published

2020

Language

EN