2013/10/31 by T. Jacqmin, Thibaut Jacqmin, Iacopo Carusotto +15 · 4 citations
Physics and Astronomy · #Condensed matter physics #Dispersion (optics) #Electron #Graphene #Lattice (music) #Massless particle #Physics #Planar #Polariton #Quantum and electron transport phenomena #Quantum mechanics #Strong Light-Matter Interactions #Topological Materials and Phenomena #cond-mat.mes-hall #cond-mat.quant-gas
paper · pdf · doi:10.1103/physrevlett.112.116402
published as Physical Review Letters 112 (2014) 116402
arxiv created 2014/03/04 · openalex publication_date 2014/03/18 · arxiv updated 2014/03/20 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
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 observe p orbital bands, one of them with the nondispersive character of a flatband. The realization of this structure which holds massless, massive, and infinitely massive particles opens the route towards studies of the interplay of dispersion, interactions, and frustration in a novel and controlled environment.