One-way reflection-free exciton-polariton spin filtering channel

Abstract

We consider theoretically exciton-polaritons in a strip of honeycomb lattice with zigzag edges and it is shown that the interplay among the spin-orbit coupling, Zeeman splitting, and an onsite detuning between sublattices can give rise to a band structure where all the edge states of the system split in energy. Within an energy interval, one of the spin polarized edge states resides with the gap-less bulk having opposite spin. Being surrounded by opposite spin and the absence of the backward propagating edge state ensures both reflection free and feedback suppressed one-way flow of polaritons with one particular spin in the system. The edge states in this system are more localized than those in the standard topological polariton systems and are fully spin polarized. This paves the way for feedback free spin-selective polariton channels for transferring information in polariton networks.

arXiv comment5 pages, 5 figures

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Cited by in corpus (7)

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• From the topological spin-Hall effect to the non-Hermitian skin effect in an elliptical micropillar chain
• Optically induced topological spin-valley Hall effect for exciton polaritons
• Polariton spin jets through optical control
• Spin-polarized antichiral exciton-polariton edge states
• Microcavity polaritons for topological photonics
• Oscillating edge states in polariton topological insulators