Screening nearest-neighbor interactions in networks of exciton-polariton condensates through spin orbit coupling

Aristov, Denis, Sigurdsson, Helgi and Lagoudakis, Pavlos (2022) Screening nearest-neighbor interactions in networks of exciton-polariton condensates through spin orbit coupling. Physical Review B, 105 (15), 155306, [155306]. (doi:10.1103/PhysRevB.105.155306).

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Abstract

We study the modification of the spatial coupling parameter between interacting ballistic exciton-polariton condensates in the presence of photonic spin orbit coupling appearing from TE-TM splitting in planar semiconductor microcavities. We propose a strategy to make the coupling strength between next-nearest-neighbours stronger than between nearest-neighbour, which inverts the conventional idea of the spatial coupling hierarchy between sites. Our strategy relies on the dominantly populated high-momentum components in the ballistic condensates which, in the presence of TE-TM splitting, lead to rapid radial precession of the polariton pseudospin. As a consequence, condensate pairs experience distance-periodic screening of their interaction strength, severely modifying their synchronization and condensation threshold solutions.

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