Nature Communications (Apr 2020)

Observation of an unpaired photonic Dirac point

  • Gui-Geng Liu,
  • Peiheng Zhou,
  • Yihao Yang,
  • Haoran Xue,
  • Xin Ren,
  • Xiao Lin,
  • Hong-xiang Sun,
  • Lei Bi,
  • Yidong Chong,
  • Baile Zhang

DOI
https://doi.org/10.1038/s41467-020-15801-z
Journal volume & issue
Vol. 11, no. 1
pp. 1 – 7

Abstract

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Observing the photonic analogue of an unpaired Dirac point is hard, as it requires breaking the time-reversal symmetry. Here, the authors use gyromagnetic materials to do that, and thus succeed in observing an unpaired Dirac point in a planar photonic crystal operating at microwave frequencies.