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

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<mark>Journal publication date</mark>2/03/2018
<mark>Journal</mark>Physical Review Letters
Issue number9
Volume120
<mark>State</mark>Published
<mark>Original language</mark>English

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 Letter 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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© 2018 American Physical Society