Chiral Quasi-Bound States in the Continuum

Abstract

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.

arXiv comment33 pages, 6 figures

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Cited by in corpus (26)

• Observation of intrinsic chiral bound states in the continuum
• Planar chiral metasurfaces with maximal tunable chiroptical response driven by bound states in the continuum
• Applications of Bound States in the Continuum in Photonics
• Enhanced Light-Matter Interaction in Two-Dimensional Transition Metal Dichalcogenides
• Leaky-wave metasurfaces for integrated photonics
• Resonant chiral effects in nonlinear dielectric metasurfaces
• Ultra-narrowband terahertz circular dichroism driven by planar metasurface supporting chiral quasi bound states in continuum
• Bound states in the continuum in photonic structures
• Nonlinear chiral metaphotonics
• Near-unity third-harmonic circular dichroism driven by quasi-BIC in asymmetric silicon metasurfaces
• Perfect diffraction metagratings supporting bound states in the continuum and exceptional points
• Giant superchiral field at merged bound states in the continuum
• Spin-Orbit-Locking Chiral Bound States in the Continuum
• Janus Bound States in the Continuum with Asymmetric Topological Charges
• Chiral Dichroism in Resonant Metasurfaces with Monoclinic Lattices
• Universal metasurfaces for complete linear control of coherent light transmission
• Observation of Photonic Chiral Flatbands
• Extremely intrinsic chirality in two-dimensional planar waveguide grating induced by quasi-bound states in the continuum
• Substrate-induced maximum optical chirality of planar dielectric structures
• Degenerate bound states in the continuum in square and triangular open acoustic resonators
• High efficiency, high quality factor active membrane metasurfaces with extended Kerker effect
• Bound states in the continuum in a two-channel Fano-Anderson model
• Kondo enhancement of current induced spin accumulation in a quantum dot
• Light-cone-proximal quasi-BICs for chiral lasing at grazing angles
• Complex Band Structure and Bound States in the Continuum: A Unified Theoretical Framework
• Maximal Axion Optical Chirality Enabled by Degenerate Quasibound States in the Continuum