A phase transition between disordered and quasi-ordered states, known as the Berezinskii–Kosterlitz–Thouless transition, has now been revealed in a two-dimensional photonic ‘fluid’. The interplay between phase singularities and coherence may lead to new vortex-based optical applications.
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Bellec, M., Michel, C. Disordering a superfluid of light. Nat. Photonics 14, 471–473 (2020). https://doi.org/10.1038/s41566-020-0663-4
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DOI: https://doi.org/10.1038/s41566-020-0663-4
