3 years ago

Transition from propagating polariton solitons to a standing wave condensate induced by interactions.

H. Sigurdsson, J. K. Chana, D. N. Krizhanovskii, O. A. Egorov, M. Sich, M. S. Skolnick, P. M. Walker, D. V. Skryabin, B. Royall, E. Clarke, I. A. Shelykh

We explore nonlinear transitions of polariton wavepackets, first, to a soliton and then to a standing wave polariton condensate in a multi-mode microwire system. At low polariton density we observe ballistic propagation of the multi-mode polariton wavepackets arising from the interference between different transverse modes. With increasing polariton density, the wavepackets transform into single mode bright solitons due to effects of both inter-modal and intra-modal polariton-polariton scattering. Further increase of the excitation density increases thermalisation speed leading to relaxation of the polariton density distribution in momentum space with the resultant formation of a non-equilibrium condensate manifested by a standing wave pattern across the whole sample.

Publisher URL: http://arxiv.org/abs/1801.04430

DOI: arXiv:1801.04430v1

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