Topological Fano Resonances

Abstract

The Fano resonance is a widespread wave scattering phenomenon associated with a peculiar asymmetric and ultra-sharp line shape, which has found applications in a large variety of prominent optical devices. While its substantial sensitivity to geometrical and environmental changes makes it the cornerstone of efficient sensors, it also renders the practical realization of Fano-based systems extremely challenging. Here, we introduce the concept of topological Fano resonance, whose ultra-sharp asymmetric line shape is guaranteed by design and protected against geometrical imperfections, yet remaining sensitive to external parameters. We report the experimental observation of such resonances in an acoustic system, and demonstrate their inherent robustness to geometrical disorder. Such topologically-protected Fano resonances, which can also be found in microwave, optical and plasmonic systems, open up exciting frontiers for the generation of various reliable wave-based devices including low-threshold lasers, perfect absorbers, ultrafast switches or modulators, and highly accurate interferometers, by circumventing the performance degradations caused by inadvertent fabrication flaws.

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• Topological Photonics
• Photonic Floquet Topological Insulators
• Fano resonances in nanoscale structures
• Imaging topological edge states in silicon photonics
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• Topological Acoustics
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• Observation of topological valley transport of sound in sonic crystals
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• Observation of photonic anomalous Floquet Topological Insulators
• Helical Metal Inside a Topological Band Insulator
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Cited by in corpus (35)

• Topological acoustics
• Applications of Bound States in the Continuum in Photonics
• Metasurface engineering through bound states in the continuum
• Realization of an acoustic third-order topological insulator
• Topological Fano Resonances
• Non-linear second-order topological insulators
• Demonstration of a 3rd order hierarchy of higher order topological states in a three-dimensional acoustic metamaterial
• Observation of non-Abelian nodal links in photonics
• Acoustic Su-Schrieffer-Heeger lattice: Direct mapping of acoustic waveguides to Su-Schrieffer-Heeger model
• Flat bands in magic-angle vibrating plates
• Fano resonance from a one-dimensional topological photonic crystal
• Topologically protected Fano resonance in photonic valley Hall insulators
• Untying links through anti-parity-time-symmetric coupling
• Transmission zeros and ultrasensitive detection in complex systems
• Local markers for crystalline topology
• Optical response of a topological-insulator--quantum-dot hybrid interacting with a probe electric field
• Zero-index Weyl metamaterials
• Topological properties of two-dimensional photonic square lattice without $C_4$ and $M_{x(y)}$ symmetries
• Topological inverse band theory in waveguide quantum electrodynamics
• Topological interface states induced by incident angle in the 1D elastic wave system
• Robust Transport of the Edge Modes along the Photonic Topological Interfaces of Different Configurations
• Acoustic Birefringence via Non-Eulerian Metamaterials
• Robust incoherent perfect absorption
• Fano resonances induced by the topological magnetoelectric effect
• Realization of topological superlattices and the associated interface states in one-dimensional plasmonic crystals
• Simulating Topological Robustness of Fano Resonance in Rotated Honeycomb Photonic Crystals
• Controlling periodic Fano resonances of quantum acoustic waves with a giant atom coupled to microwave waveguide
• Signature of edge states in resonant wave scattering
• Sensitivity of topological edge states in a non-Hermitian dimer chain
• Controllable non-reciprocal transmission of single photon in Mobius structure
• Topological phase transition of the centered rectangular photonic lattice
• Controllable Single Photon Scattering via Coupling of Driven $\Lambda$ System with Topological Waveguide
• Transmission in a Fano-Anderson chain with a topological defect
• Bound states in the continuum and Fano resonances in subwavelength resonator arrays
• Embedding 1D BDI topological dynamics into continuous elastic plates