Tunable magnetic alignment between trapped exciton-polariton condensates
del, Valle-Inclan Redondo Y
Physical Review Letters
American Physical Society
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Ohadi, H., del, V. R. Y., Dreismann, A., Rubo, Y., Pinsker, F., Tsintzos, S., Hatzopoulos, Z., et al. (2016). Tunable magnetic alignment between trapped exciton-polariton condensates. Physical Review Letters, 116 106403. https://doi.org/10.1103/PhysRevLett.116.106403
Tunable spin correlations are found to arise between two neighboring trapped exciton-polariton condensates which spin-polarize spontaneously. We observe a crossover from an antiferromagnetic- to a ferromagnetic pair state by reducing the coupling barrier in real-time using control of the imprinted pattern of pump light. Fast optical switching of both condensates is then achieved by resonantly but weakly triggering only a single condensate. These effects can be explained as the competition between spin bifurcations and spin-preserving Josephson coupling between the two condensates, and opens the way to polariton Bose-Hubbard ladders.
This work was supported by EPSRC Grant No. EP/G060649/1, EP/L027151/1, EU Grant No. INDEX 289968, ERC Grant No. LINASS 320503, the Leverhulme Trust Grant No. VP1-2013-011, Spanish MEC (Grant No. MAT2008-01555), the Greek GSRT ARISTEIA Apollo program and Fundación La Caixa, and Mexican CONACYT Grant No. 251808. FP acknowledges financial support through a Schrödinger Fellowship at the University of Oxford and NQIT project (EP/M013243/1).
European Research Council (320503)
UNIVERSITY OF OXFORD (FB EPSRC) (EP/M013243/1)
EC FP7 MC ITN (289968)
External DOI: https://doi.org/10.1103/PhysRevLett.116.106403
This record's URL: https://www.repository.cam.ac.uk/handle/1810/253763