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Exciton Polaritons in a Two-Dimensional Lieb Lattice with Spin-Orbit Coupling

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arxiv 1705.03006 v2 pith:FPK4GNKH submitted 2017-05-06 cond-mat.mes-hall

classification cond-mat.mes-hall
keywords couplingflatspin-orbitbandlatticelieborbitalphotonic
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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 $P_{x,y}$ 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 work shows the potential of polariton lattices for emulating flat band Hamiltonians with spin-orbit coupling, orbital degrees of freedom and interactions.

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  1. Quantum Metric Bound State of Light

    cond-mat.mes-hall 2026-06 unverdicted novelty 7.0 of 10

    Defect-induced bound states in flat bands have exponential decay length lower-bounded by the quantum metric when kinetic energy and CLS protection are absent.

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