Optical bistability in electrically driven polariton condensates. M. Amthor, T. C. H. Liew, C. Metzger, S. Brodbeck, L. Worschech, M. Kamp, I. A. Shelykh, A. V. Kavokin, C. Schneider and S. Höfling in Phys. Rev. B 91:081404(R) (2015).