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Topologically Protected Broadband Rerouting of Propagating Waves Around Complex Objects by Zeki Hayran; Seyyed Ali Hassani Gangaraj; Francesco Monticone is a Engineering article available to read on EtoBox.

What is Topologically Protected Broadband Rerouting of Propagating Waves Around Complex Objects about?

Achieving robust propagation and guiding of electromagnetic waves through complex and disordered structures is a major goal of modern photonics research, for both classical and quantum applications. Although the realization of backscattering-free and disorder-immune guided waves has recently become possible through various photonic schemes inspired by topological insulators in condensed matter physics, the interaction between such topologically protected guided waves and free-space propagating waves remains mostly unexplored, especially in the context of scattering systems. Here, we theoretically demonstrate that free-space propagating plane waves can be efficiently coupled into topological one-way surface waves, which can seamlessly flow around sharp corners and electrically large barriers and release their energy back into free space in the form of leaky-wave radiation. We exploit this physical mechanism to realize topologically protected wave-rerouting around an electrically large impenetrable object of complex shape, with transmission efficiency exceeding 90%, over a relatively broad bandwidth. The proposed topological wave-rerouting scheme is based on a stratified structure co

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Author

Zeki Hayran; Seyyed Ali Hassani Gangaraj; Francesco Monticone

Publisher

Walter de Gruyter GmbH

Published

2019

Language

EN

Field

Engineering (Physical Sciences)