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Controllable Photonic Topological Insulating Chain Based on Non-Hermiticity

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Abstract

We determine theoretically a one-dimensional photonic insulating lattice whose bulk topology is controllable simply by tuning gain and loss. The system with four-cavity periods realizes a non-Hermiticity-induced topological transition and reconfigurable midgap topological interface states.

© 2018 The Author(s)

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