Whittaker, C. E. and Cancellieri, Emiliano and Walker, P. M. and Gulevich, D. R. and Schomerus, Henning Ulrich and Vaitiekus, D. and Royall, B. and Whittaker, D. M. and Clarke, E. and Iorsh, I. V. and Shelykh, Ivan and Skolnick, M. S. and Krizhanovskii, D. N. (2018) Exciton Polaritons in a Two-Dimensional Lieb Lattice with Spin-Orbit Coupling. Physical review letters, 120 (9). ISSN 1079-7114
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Abstract
We study exciton polaritons in a two-dimensional Lieb lattice of micropillars. The energy spectrum of the system features two flat bands formed from S and Px,y photonic orbitals, into which we trigger bosonic condensation under high power excitation. The symmetry of the orbital wave functions combined with photonic spin-orbit coupling gives rise to emission patterns with pseudospin texture in the flat band condensates. Our Letter shows the potential of polariton lattices for emulating flat band Hamiltonians with spin-orbit coupling, orbital degrees of freedom, and interactions.