Applied Physics Letters
Spintronics, Transport phenomena, Polaritons, Elastic scattering
The optical spin Hall effect is a transport phenomenon of exciton polaritons in semiconductor microcavities, caused by the polaritonic spin-orbit interaction, which leads to the formation of spin textures. The control of the optical spin Hall effect via light injection in a double microcavity is demonstrated. Angular rotations of the polarization pattern up to 22 degrees are observed and compared to a simple theoretical model. The device geometry is responsible for the existence of two polariton branches which allows a robust independent control of the polariton spin and hence the polarization state of the emitted light field, a solution technologically relevant for future spin-optronic devices.
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Lafont, O., Luk, S. M. H., Lewandowski, P., Kwong, N. H., Leung, P. T., Galopin, E., … Binder, R. (2017). Controlling the Optical Spin Hall Effect with Light. Applied Physics Letters, 110(6), 1–4.