Fano resonances in photonics

By M. Limonov, M. V. Rybin, A. Poddubny, Yuri Kivshar. Nature Photonics, 2017

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Applications of bound states in the continuum in photonics (2023, background): “Fano resonances occur when a discrete bound state interacts with a continuum of bright states 119–121 .”
Nonlocal flat optics (2022, background): “the incident wave and the guided mode (one of its space harmonics if the structure is periodic [28]), and they typically manifest as asymmetric, sharp spectral features known as “Fano resonances” [29], which stem from the interference between the slowly varying off-resonant response of the structure”
Nonlinear optics in all-dielectric nanoantennas and metasurfaces: a review (2019, background): “interference of discrete (resonance) states with broadband (continuum) states.(113) To observe Fano resonance from all-dielectric”
Optical Metasurfaces: Progress and Applications (2018, background): “Aside from the plasmonic and dielectric metasurface designs based on dipolar resonances, researchers are also looking into coupled resonators exhibiting Fano resonances, which arise from the interference between a broad spectral line or continuum with a narrow discrete resonance (8, 23).”
Asymmetric Metasurfaces with High-Q Resonances Governed by Bound States in the Continuum. (2018, methodology): “While the analytical solution of Maxwell’s equations does not exist, the description of the transmission T with the Fano formula is still widely used by introducing the Fano parameter phenomenologically [32].”