Broadband topological slow light through higher momentum-space winding

Abstract

Slow-light waveguides can strongly enhance light-matter interaction, but suffer from narrow bandwidth, increased backscattering, and Anderson localization. Edge states in photonic topological insulators resist backscattering and localization, but typically cross the bandgap over a single Brillouin zone, meaning that slow group velocity implies narrow-band operation. Here we show theoretically that this can be circumvented via an edge termination that causes the edge state to wind many times around the Brillouin zone, making it both slow and broadband.

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Cited by in corpus (19)

• Observation of strong backscattering in valley-Hall photonic topological interface modes
• Topologically protected valley-dependent quantum photonic circuits
• Quantifying the robustness of topological slow light
• Observation of unidirectional soliton-like edge states in nonlinear Floquet topological insulators
• Experimental demonstration of topological slow light waveguides in valley photonic crystals
• Topological Phases of Photonic Crystals under Crystalline Symmetries
• Observation of topological frequency combs
• Topologically-protected single-photon sources with topological slow light photonic crystal waveguides
• Topological slow light via coupling chiral edge modes with flat bands
• Liquid-crystal-based topological photonics
• Gradient catastrophe of nonlinear photonic valley-Hall edge pulses
• Optical control of topological end states via soliton formation in a 1D lattice
• Macroscopic Zeno effect in Su-Schrieffer-Heeger photonic topological insulator
• Cavity-induced backscattering in a two-dimensional photonic topological system
• Stability of topologically protected slow light against disorder
• Dynamics of transmission in disordered topological insulators
• Time delay in a disordered topological system
• Self-steepening-induced stabilization of nonlinear edge waves at photonic valley-Hall interfaces
• Boundary-induced helical bulk acoustic transport in LiNbO3 thin films