Spin-selective spatial filtering of propagating polariton condensates, using a controllable spin-dependent gating barrier, in a one-dimensional semiconductor microcavity ridge waveguide is reported. A nonresonant laser beam provides the source of propagating polaritons while a second circularly polarized weak beam imprints a spin dependent potential barrier, which gates the polariton flow and generates polariton spin currents. A complete spin-based control over the blocked and transmitted polaritons is obtained by varying the gate polarization.
@article{arxiv.1504.01968,
title = {Spin Selective Filtering of Polariton Condensate Flow},
author = {T. Gao and C. Antón and T. C. H. Liew and M. D. Martín and Z. Hatzopoulos and L. Viña and P. S. Eldridge and P. G. Savvidis},
journal= {arXiv preprint arXiv:1504.01968},
year = {2015}
}