Selection rule for Dirac-like points in two-dimensional dielectric photonic crystals

Yan Li, Ying Wu, Xi Chen, Jun Mei

Research output: Contribution to journalArticlepeer-review

32 Scopus citations

Abstract

We developed a selection rule for Dirac-like points in two-dimensional dielectric photonic crystals. The rule is derived from a perturbation theory and states that a non-zero, mode-coupling integral between the degenerate Bloch states guarantees a Dirac-like point, regardless of the type of the degeneracy. In fact, the selection rule can also be determined from the symmetry of the Bloch states even without computing the integral. Thus, the existence of Dirac-like points can be quickly and conclusively predicted for various photonic crystals independent of wave polarization, lattice structure, and composition. © 2013 Optical Society of America.
Original languageEnglish (US)
Pages (from-to)7699
JournalOptics Express
Volume21
Issue number6
DOIs
StatePublished - Mar 21 2013

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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