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

A. Getter and I. E. Perakis
Phys. Rev. B 60, 16027 – Published 15 December 1999
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Abstract

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.

  • Received 17 May 1999

DOI:https://doi.org/10.1103/PhysRevB.60.16027

©1999 American Physical Society

Authors & Affiliations

A. Getter and I. E. Perakis

  • Department of Physics and Astronomy, Vanderbilt University, Nashville, Tennessee 37235

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Issue

Vol. 60, Iss. 23 — 15 December 1999

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