We report on experimental observation of next-nearest-neighbour coupling between ballistically expanding spinor exciton-polariton condensates in a planar semiconductor microcavity. All-optical control over the coupling strength between neighbouring condensates is demonstrated through distance-periodic pseudospin screening of their ballistic particle outflow due to the inherent splitting of the planar cavity transverse-electric (TE) and transverse-magnetic (TM) modes. By screening the nearest-neighbour coupling we overcome the conventional spatial coupling hierarchy between condensates. This offers a promising route towards creating unconventional non-planar many-body Hamiltonians using networks of ballistically expanding spinor exciton-polariton condensates.
@article{arxiv.2301.04210,
title = {Next nearest neighbour coupling with spinor polariton condensates},
author = {Dmitriy Dovzhenko and Denis Aristov and Lucy Pickup and Helgi Sigurdsson and Pavlos G. Lagoudakis},
journal= {arXiv preprint arXiv:2301.04210},
year = {2024}
}