We report on the experimental observation of the non-linear analogue of the optical spin Hall effect under highly non-resonant circularly polarized excitation of an exciton polariton condensate in a GaAs/AlGaAs microcavity. Initially circularly polarized polariton condensates propagate over macroscopic distances while the collective condensate spins coherently precess around an effective magnetic field in the sample plane performing up to four complete revolutions.
@article{arxiv.1204.4799,
title = {The Non-linear Optical Spin Hall Effect and Long-Range Spin Transport in Polariton Lasers},
author = {Elena Kammann and Timothy C. H. Liew and Hamid Ohadi and Pasquale Cilibrizzi and Panayiotis Tsotsis and Zacharias Hatzopoulos and Pavlos G. Savvidis and Alexey V. Kavokin and Pavlos G. Lagoudakis},
journal= {arXiv preprint arXiv:1204.4799},
year = {2015}
}