Optically Induced Magnetization of CdMnTe Self-Assembled Quantum Dots
  We demonstrate that resonant excitation of CdMnTe self-assembled quantum dots creates an ensemble of spin-polarized magnetic polarons at B=0 T. The strong spatial confinement characteristic of quantum dots significantly increases the stability of magnetic polarons so that the optically induced spin alignment is observed for temperatures > 120 K. 
S. Mackowski, T. Gurung, T.A. Nguyen, H.E. Jackson, L.M. Smith, G.   Karczewski and J. Kossut