TY - JOUR
T1 - Semi-Dirac Transport and Anisotropic Localization in Polariton Honeycomb Lattices
AU - Real, B.
AU - Jamadi, O.
AU - Milićević, M.
AU - Pernet, N.
AU - St-Jean, P.
AU - Ozawa, T.
AU - Montambaux, G.
AU - Sagnes, I.
AU - Lemaître, A.
AU - Le Gratiet, L.
AU - Harouri, A.
AU - Ravets, S.
AU - Bloch, J.
AU - Amo, A.
N1 - Funding Information:
We thank J.-N. Fuchs, F. Mangussi, and G. Usaj for fruitful discussions. This work was supported by the H2020-FETFLAG project PhoQus (820392), the QUANTERA project Interpol (ANR-QUAN-0003-05), the French National Research Agency project Quantum Fluids of Light (ANR-16-CE30-0021), the Paris Ile-de-France Region in the framework of DIM SIRTEQ, the Marie Sklodowska-Curie individual fellowship ToPol, the Labex NanoSaclay (ANR-10-LABX-0035), the French government through the Programme Investissement dAvenir (I-SITE ULNE / ANR-16-IDEX-0004 ULNE) managed by the Agence Nationale de la Recherche, the French RENATECH network, the Labex CEMPI (ANR-11-LABX-0007), the CPER Photonics for Society P4S and the Métropole Européenne de Lille (MEL) via the project TFlight. T. O. is supported by JSPS KAKENHI Grant No. JP18H05857, JST PRESTO Grant No. JPMJPR19L2, JST CREST Grant No. JPMJCR19T1, and the Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS) at RIKEN.
Publisher Copyright:
© 2020 American Physical Society.
PY - 2020/10/28
Y1 - 2020/10/28
N2 - Compression dramatically changes the transport and localization properties of graphene. This is intimately related to the change of symmetry of the Dirac cone when the particle hopping is different along different directions of the lattice. In particular, for a critical compression, a semi-Dirac cone is formed with massless and massive dispersions along perpendicular directions. Here we show direct evidence of the highly anisotropic transport of polaritons in a honeycomb lattice of coupled micropillars implementing a semi-Dirac cone. If we optically induce a vacancylike defect in the lattice, we observe an anisotropically localized polariton distribution in a single sublattice, a consequence of the semi-Dirac dispersion. Our work opens up new horizons for the study of transport and localization in lattices with chiral symmetry and exotic Dirac dispersions.
AB - Compression dramatically changes the transport and localization properties of graphene. This is intimately related to the change of symmetry of the Dirac cone when the particle hopping is different along different directions of the lattice. In particular, for a critical compression, a semi-Dirac cone is formed with massless and massive dispersions along perpendicular directions. Here we show direct evidence of the highly anisotropic transport of polaritons in a honeycomb lattice of coupled micropillars implementing a semi-Dirac cone. If we optically induce a vacancylike defect in the lattice, we observe an anisotropically localized polariton distribution in a single sublattice, a consequence of the semi-Dirac dispersion. Our work opens up new horizons for the study of transport and localization in lattices with chiral symmetry and exotic Dirac dispersions.
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U2 - 10.1103/PhysRevLett.125.186601
DO - 10.1103/PhysRevLett.125.186601
M3 - Article
C2 - 33196264
AN - SCOPUS:85094926371
SN - 0031-9007
VL - 125
JO - Physical Review Letters
JF - Physical Review Letters
IS - 18
M1 - 186601
ER -