Observation of a magnetic-field-induced transition in the behavior of extremely shallow quantum well excitons

Academic Article


  • Using magnetoabsorption and electroabsorption techniques, we study excitons with binding energy comparable to the depth of GaAs/AlGaAs quantum wells. In-plane magnetic fields decrease the exciton linewidth considerably. Without magnetic fields, electroabsorption reveals 3D-like exciton behavior. This broadening persists with magnetic fields along the growth direction, but changes to a redshift for in-plane magnetic fields, reminiscent of 2D-like excitons. We discuss how in-plane magnetic fields change the nature of the exciton by inducing a two-body velocity-dependent interaction. © 1996 American Physical Society.
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    Author List

  • Fritze M; Perakis IE; Getter IE; Knox W; Goossen KW; Cunningham JE; Jackson SA
  • Start Page

  • 106
  • End Page

  • 109
  • Volume

  • 76
  • Issue

  • 1