Observation of topologically enabled unidirectional guided resonances

Observation of topologically enabled unidirectional guided resonances

Nature, Published online: 22 April 2020; doi:10.1038/s41586-020-2181-4

Unidirectional radiation is achieved in a photonic crystal slab without the use of mirrors by merging a pair of topological defects carrying half-integer charges.
Source: Nature

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