Light confinement at a Dirac point in honeycomb-like lattice photonic crystal

Qiuping Mao, Kang Xie*, Lei Hu, Qian Li, Wei Zhang, Haiming Jiang, Zhijia Hu, Erlei Wang

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Optical waveguides and cavities are important components among modern optical devices. Traditional optical cavities rely on total internal reflection or photonic bandgaps to achieve field confinement. Recently, a new type of trapped mode, the Dirac mode, has been reported to occur in triangular or honeycomb lattice photonic crystal. This novel localized mode is attribute to neither of the traditional light-guiding mechanisms and owns different characteristics. Here we report the discovery of the Dirac mode in honeycomb-like photonic crystal lattice. The Dirac mode occurs at a Dirac frequency, which is beyond the complete photonic bandgaps. It has a different algebraic-decay feature. Our discovery extends applicability of the Dirac mode in designing for optical devices.

Original languageEnglish
Pages (from-to)11-15
Number of pages5
JournalOptics Communications
Early online date13 Oct 2016
Publication statusPublished - 1 Feb 2017


  • Algebraic-decay
  • Dirac mode
  • Field confinement
  • Photonic crystal


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