Nontrivial phase coupling in polariton multiplets
Abstract
We investigate the phase coupling between spatially separated polariton condensates under nonresonant optical pulsed excitation. In the simple case of two condensates, we observe phase locking either in symmetric or antisymmetric states. We demonstrate that the coupling symmetry depends both on the separation distance and outflow velocity from the condensates. We interpret the observations through stimulated relaxation of polaritons to the phase configuration with the highest occupation. We derive an analytic criterion for the phase locking of a pair-polariton condensate and extend it to polariton multiplets. In the case of three condensates, we predict theoretically and observe experimentally either in-phase locking or the appearance of phase winding with phase differences of ±2π/3 between neighbors. The latter state corresponds to a vortex of winding number ±1 across the three polariton condensates.
Citation
Ohadi , H , Gregory , R L , Freegarde , T , Rubo , Y G , Kavokin , A V , Berloff , N G & Lagoudakis , P G 2016 , ' Nontrivial phase coupling in polariton multiplets ' , Physical Review X , vol. 6 , no. 3 , 031032 . https://doi.org/10.1103/PhysRevX.6.031032
Publication
Physical Review X
Status
Peer reviewed
ISSN
2160-3308Type
Journal article
Description
P. G. L. and A. V. K. acknowledge EPSRC through Programme Grant on Hybrid Polaritonics EP/M025330/1 and EP/F026455/1 for co-supporting this work. N. G. B acknowledges financial support by the Ministry of Education and Science of the Russian Federation 1425320 (Project DOI: RFMEFI58114X0006). Y. G. R. acknowledges financial support by CONACYT (Mexico) under Grant No. 251808.Collections
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