Optical circuits based on Polariton Neurons in Semiconductor   Microcavities
  By exploiting the polarization multistability of polaritons, we show that polarized signals can be conducted in the plane of a semiconductor microcavity along controlled channels or "neurons". Furthermore due to the interaction of polaritons with opposite spins it is possible to realize binary logic gates operating on the polarization degree of freedom. Multiple gates can be integrated together to form an optical circuit contained in a single semiconductor microcavity. 
T. C. H. Liew, I. A. Shelykh, A. V. Kavokin