S. Arora, T. Bauer, R. Barczyk, E. Verhagen and L. Kuipers
Light: Science & Applications, 10, 9 (2021). https://doi.org/10.1038/s41377-020-00458-6

Photonic topological insulators are currently at the forefront of on-chip photonic research due to their potential for loss-free information transport. Realized in photonic crystals, they enable robust propagation of optical states along domain walls. But how robust is robust? In order to answer this, together with a group of researchers from AMOLF we quantified photonic edge state transport using phase-resolved near-field optical microscopy. The findings provide a crucial step towards error-free integrated photonic quantum networks.

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