Nature Communications (Dec 2016)

Direct observation of exceptional points in coupled photonic-crystal lasers with asymmetric optical gains

  • Kyoung-Ho Kim,
  • Min-Soo Hwang,
  • Ha-Reem Kim,
  • Jae-Hyuck Choi,
  • You-Shin No,
  • Hong-Gyu Park

DOI
https://doi.org/10.1038/ncomms13893
Journal volume & issue
Vol. 7, no. 1
pp. 1 – 9

Abstract

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Non-Hermitian optical systems have been shown to sustain lasing when they go from a PT-symmetric to a PT-symmetry-broken phase. Here, Kimet al. study this phase transition of lasing modes in partially graphene-covered coupled microcavities and show tuning of an exceptional point.