Controlled ordering of topological charges in an exciton-polariton chain
Abstract
We demonstrate, experimentally and theoretically, controlled loading of an exciton-polariton vortex chain into a 1D array of trapping potentials. Switching between two types of vortex chains, with topological charges of the same or alternating sign, is achieved by appropriately shaping an off-resonant pump beam that drives the system to the regime of bosonic condensation. In analogy to spin chains, these vortex sequences realise either a "ferromagnetic" or an "anti-ferromagnetic" order, whereby the role of spin is played by the orbital angular momentum. The ferromagnetic ordering of vortices is associated with the formation of a persistent chiral current. Our results pave the way for the controlled creation of nontrivial distributions of orbital angular momentum and topological order in a periodic exciton-polariton system.
Citation
Gao , T , Egorov , O A , Estrecho , E , Winkler , K , Kamp , M , Scheider , C , Höfling , S , Truscott , A G & Ostrovskaya , E A 2018 , ' Controlled ordering of topological charges in an exciton-polariton chain ' , Physical Review Letters , vol. 121 , no. 22 , 225302 . https://doi.org/10.1103/PhysRevLett.121.225302
Publication
Physical Review Letters
Status
Peer reviewed
ISSN
0031-9007Type
Journal article
Rights
© 2018, American Physical Society. This work has been made available online in accordance with the publisher’s policies. This is the author created accepted version manuscript following peer review and as such may differ slightly from the final published version. The final published version of this work is available at https://journals.aps.org/prl
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