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TOPOLOGICAL PHOTONICS

Topology in momentum space becomes real

Using topological singular points, the topological charge of photonic crystals in momentum space is successfully transferred to optical vortex beams in real space.

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Fig. 1: Generation of an optical vortex with ei2θ by a photonic crystal.

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Correspondence to Masaya Notomi.

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Notomi, M. Topology in momentum space becomes real. Nat. Photonics 14, 595–596 (2020). https://doi.org/10.1038/s41566-020-0693-y

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