Fano resonance from a one-dimensional topological photonic crystal

Abstract

An ultra-compact one-dimensional topological photonic crystal (1D-TPC) is designed in a single mode silicon bus-waveguide to generate Fano resonance lineshape. The Fano resonance comes from the interference between the discrete topological boundary state of the 1D-TPC and the continuum high-order leaky mode of the bus-waveguide. Standalone asymmetric Fano resonance lineshapes are obtained experimentally in the waveguide transmission spectrum with a maximum extinction ratio of 33 dB and a slope ratio of 10 dB/nm over a broadband flat background.

References in corpus (4)

• Analogs of quantum Hall effect edge states in photonic crystals
• Low-threshold topological nanolasers based on second-order corner state
• Fano resonance control in a photonic crystal structure and its application to ultrafast switching
• Topologically protected Fano resonance in photonic valley Hall insulators

Cited by in corpus (1)

• Controllable Single Photon Scattering via Coupling of Driven $\Lambda$ System with Topological Waveguide