Nature Communications (May 2017)

An integrated parity-time symmetric wavelength-tunable single-mode microring laser

  • Weilin Liu,
  • Ming Li,
  • Robert S. Guzzon,
  • Erik J. Norberg,
  • John S. Parker,
  • Mingzhi Lu,
  • Larry A. Coldren,
  • Jianping Yao

Journal volume & issue
Vol. 8, no. 1
pp. 1 – 6


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The breaking of parity-time symmetric gain and loss profiles can be used to achieve single-mode lasing in coupled microring resonators. Here, Liuet al. show that this effect can be electrically controlled with a tunable lasing wavelength and strong sidemode suppression.