Spin-polarized antichiral exciton-polariton edge states

Abstract

We consider theoretically a system of exciton-polariton micropillars arranged in a honeycomb lattice. The naturally present TE-TM splitting and an alternating Zeeman splitting, where the different sublattices experience opposite Zeeman splitting, shifts the Dirac points in energy, giving rise to antichiral behavior. In a strip geometry having zigzag edges, two pairs of edge states exist and propagate in the same direction (including the states at the opposite edges). The edge modes localized at the opposite edges have opposite spins (circular polarizations), which leads to co-propagating "+-" spin channels. The antichiral edge states are protected by non-zero winding numbers and can propagate around a 60 degree bend without being reflected. We further compare the transport properties of these edge states with chiral edge modes and propose a scheme to realize them experimentally.

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Cited by in corpus (4)

• Two-dimensional Weyl nodal-line semimetal and antihelical edge states in a modified Kane-Mele model
• Topological enhancement of exciton-polariton coherence with non-Hermitian morphing
• Spin-dependent gain and loss in photonic quantum spin Hall systems
• Oscillating edge states in polariton topological insulators