Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons.

@article{Jacqmin2014DirectOO,
  title={Direct observation of Dirac cones and a flatband in a honeycomb lattice for polaritons.},
  author={T. Jacqmin and Iacopo Carusotto and Isabelle Sagnes and Marco Abbarchi and Dmitry D. Solnyshkov and Guillaume Malpuech and {\'E}lisabeth Galopin and Aristide Lema{\^i}tre and Jacqueline Bloch and Alberto Amo},
  journal={Physical review letters},
  year={2014},
  volume={112 11},
  pages={
          116402
        }
}
Two-dimensional lattices of coupled micropillars etched in a planar semiconductor microcavity offer a workbench to engineer the band structure of polaritons. We report experimental studies of honeycomb lattices where the polariton low-energy dispersion is analogous to that of electrons in graphene. Using energy-resolved photoluminescence, we directly observe Dirac cones, around which the dynamics of polaritons is described by the Dirac equation for massless particles. At higher energies, we… 

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