Light trapping and circularly polarization at a Dirac point in 2D plasma photonic crystals

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

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Light trapping at the Dirac point in 2D plasma photonic crystal has been obtained. The new localized mode, Dirac mode, is attributable to neither photonic bandgap nor total internal reflection. It exhibits a unique algebraic profile and possesses a high-Q factor resonator of about 105. The Dirac point could be modulated by tuning the filling factor, plasma frequency and plasma cyclotron frequency, respectively. When a magnetic field parallel to the wave vector is applied, Dirac modes for right circularly polarized and left circularly polarized waves could be obtained at different frequencies, and the Q factor could be tuned. This property will add more controllability and flexibility to the design and modulation of novel photonic devices. It is also valuable for the possibilities of Dirac modes in photonic crystal containing other kinds of metamaterials.

Original languageEnglish
Pages (from-to)431-437
Number of pages7
JournalOptics Communications
Early online date10 Nov 2017
Publication statusPublished - 1 Mar 2018


  • Circularly polarized waves
  • Dirac mode
  • Dirac point
  • Magnetized plasma
  • Photonic band structure
  • Plasma photonic crystal


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