Magnetoexciton escape from shallow quantum wells induced by in-plane electric fields

Academic Article


  • We study the change in the magnetoexciton absorption induced by an electric field parallel to the plane of a shallow quantum well. We demonstrate that, for in-plane magnetic field orientation, the discrete confined exciton peak undergoes a transition into a continuum resonance. In contrast, for perpendicular magnetic fields, the exciton peak exhibits the usual Stark redshift. We show that such a transition originates from a resonant coupling between the discrete confined exciton state and the continuum of dark bulk exciton states. As a result, the confined exciton tunnels out of the quantum well as a whole without being ionized. We discuss the possible experimental applications of this effect. © 1999 The American Physical Society.
  • Authors

    Digital Object Identifier (doi)

    Author List

  • Getter A; Perakis IE
  • Start Page

  • 16027
  • End Page

  • 16030
  • Volume

  • 60
  • Issue

  • 23