All-optical four-state magnetization reversal in (Ga,Mn)As ferromagnetic semiconductors

Academic Article


  • Using density matrix equations of motion and a tight-binding band calculation, we predict all-optical switching between four metastable magnetic states of (III,Mn)As ferromagnets. This switching is initiated non-thermally within 100 fs, during nonlinear coherent photoexcitation. For a single optical pulse, magnetization reversal is completed after ∼100 ps and controlled by the coherent femtosecond photoexcitation. Our predicted switching comes from magnetic nonlinearities triggered by a femtosecond magnetization tilt that is sensitive to un-adiabatic light-induced spin interactions. © 2011 American Institute of Physics.
  • Authors

    Published In

    Digital Object Identifier (doi)

    Author List

  • Kapetanakis MD; Lingos PC; Piermarocchi C; Wang J; Perakis IE
  • Volume

  • 99
  • Issue

  • 9