Results in Physics (Dec 2019)

Dirac cone switching in two-dimensional photonic crystals by rotation of the crystal basis

  • Jesus Manzanares-Martinez,
  • Cesar Augusto Romero-Ramos,
  • Jorge Alberto Gaspar-Armenta

Journal volume & issue
Vol. 15

Abstract

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We demonstrate that the symmetry breaking in photonic crystals can be used to obtain a narrow opening of the Dirac cone. We have found that in a two-dimensional square lattice composed by dielectric square rods, it is possible to open a bandgap by rotating the crystal basis. Our simulations of the transmission demonstrate that it can be substantially tuned, allowing a switching mechanism. These results can be useful for developing active devices.