Ferromagnetic/DMS hybrid structures: one- and zero-dimensional magnetic   traps for quasiparticles
  We investigated possibility of using local magnetic field originating from ferromagnetic island deposited on the top of semiconductor quantum well to produce zero- and one-dimensional traps for quasi-particles with spin. In particular we considered two shapes of experimentally made magnets - cylindrical and rectangular. In the case of ferromagnetic micro-disk the trap can localize spin in three dimensions, contrary to the rectangular micro-magnet which creates a trap that allows free propagation in one direction. We present in detail prediction for absorption spectrum around the main absorption edge in both type of micro-magnets. 
P. Redlinski, T. Wojtowicz, T. G. Rappoport, A. Libal, J. K. Furdyna,   B. Janko