Symmetry breaking in optical vortex rings generates photonic wave packets with opposite chiralities.

From the article:

Observation of Chiral Symmetry Breaking in Toroidal Vortices of Light
Wei Chen, Yuan Liu, An-Zhuo Yu, Han Cao, Wei Hu, Wen Qiao, Lin-Sen Chen, and Yan-Qing Lu
Phys. Rev. Lett. 132, 153801 (2024)

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