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Switchable Topological Edge States in Next-Nearest-Neighbour Coupled Resonator Lattices

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Abstract

We find that next-nearest-neighbour coupling in ring resonator lattices induces topological transitions and one-way edge modes. We design topological waveguides that are easily switchable using thermal, electro-optic, or nonlinear effects, enabling robust on-chip photon routing.

© 2018 The Author(s)

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