Interaction-induced hopping phase in driven-dissipative coupled photonic microcavities

• Published in: Nature communications 2016-06, Vol.7 (1), p.11887-6, Article 11887
• Main Authors: Rodriguez, S. R. K., Amo, A., Sagnes, I., Le Gratiet, L., Galopin, E., Lemaître, A., Bloch, J.
• Format: Article
• Language: English
• Subjects: 132/124; 140/125; 639/624/400/2797; Atoms & subatomic particles; Electrons; Energy; Humanities and Social Sciences; multidisciplinary; Science; Science (multidisciplinary)
• ISSN: 2041-1723; 2041-1723
• DOI: 10.1038/ncomms11887

The Bose-Hubbard model (BHM) describes bosons hopping across sites and interacting on-site. Inspired by the success of BHM simulators with atoms in optical lattices, proposals for implementing the BHM with photons in coupled nonlinear cavities have recently emerged. Two coupled semiconductor microcavities constitute a model system where the hopping, interaction and decay of exciton polaritons—mixed light-matter quasiparticles—can be engineered in combination with site-selective coherent driving to implement the driven-dissipative two-site optical BHM. Here we explore the interplay of interference and nonlinearity in this system, in a regime where three distinct density profiles can be observed under identical driving conditions. We demonstrate how the phase acquired by polaritons hopping between cavities can be controlled through polariton-polariton interactions. Our results open new perspectives for synthesizing density-dependent gauge fields using polaritons in two-dimensional multicavity systems. Coupled semiconductor microcavities constitute a model system where the hopping, interaction, and decay of exciton polaritons can be engineered. Here, Rodriguez et al . show how the phase acquired by polaritons hopping between cavities can be controlled through polariton-polariton interactions.