# Nonlinearity-induced photonic topological insulator

@article{Maczewsky2020NonlinearityinducedPT, title={Nonlinearity-induced photonic topological insulator}, author={Lukas J. Maczewsky and Matthias Heinrich and Mark Kremer and Sergey K. Ivanov and Max Ehrhardt and Franklin Martinez and Yaroslav V. Kartashov and Vladimir V. Konotop and Lluis Torner and Dieter Bauer and Alexander Szameit}, journal={Science}, year={2020}, volume={370}, pages={701 - 704} }

Switching on topology Ways to control and design topological features in various systems are being studied intensively because the resulting properties tend to be robust against things such as scattering and defects, endowing the system with topological protection. Maczewsky et al. now look to another regime in optics to show that optical nonlinearity can induce a topological change in the properties of a photonic lattice. At low excitation power, probe light uniformly leaks into the rest of…

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