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Direct Observation of Topological Edge States in Silicon Photonic Crystals

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Abstract

We directly observe the states of topological photonic crystals at telecom wavelengths. Using the states’ intrinsic radiation, we measure dispersion, loss, pseudospin, and spin-spin scattering. We image spin-selective unidirectional propagation around sharp corners and junctions.

© 2019 The Author(s)

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