Exciton Tunneling Revealed by Magnetically Tuned Interwell Coupling in Semiconductor Double Quantum Wells

I. Lawrence, S. Haacke, H. Mariette, W. W. Rühle, H. Ulmer-Tuffigo, J. Cibert, and G. Feuillet
Phys. Rev. Lett. 73, 2131 – Published 10 October 1994
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Abstract

We have found strong evidence for tunneling of excitons as an entity in CdTe/CdMnTe and CdTe/CdZnTe asymmetric double quantum wells (QWs). An external magnetic field changes the coupling between the two QWs by allowing resonances to occur between excitonic states. The tunneling dynamics are investigated by time-resolved and steady-state photoluminescence spectroscopies under magnetic field. Very efficient tunneling is found when the transfer of a spatially direct exciton is possible, either with the emission of LO phonons or via the resonance with the 2s state of the low energy QW.

  • Received 14 February 1994

DOI:https://doi.org/10.1103/PhysRevLett.73.2131

©1994 American Physical Society

Authors & Affiliations

I. Lawrence1,2, S. Haacke3,*, H. Mariette1, W. W. Rühle2, H. Ulmer-Tuffigo1, J. Cibert1, and G. Feuillet1

  • 1Commissariat à l'Energie Atomique-Centre National de la Recherche Scientifique joint group "Microstructures de Semiconducteurs II-VI" Department de Recherche Fondamentale sur la Matière Condensée and Laboratoire de Spectrométrie Physique, Université J. Fourier, 17 Rue des Martyrs, 38054 Grenoble Cedex 9, France
  • 2Max-Planck-Institut für Festkörperforschung, Heisenbergstrasse 1, 70569 Stuttgart, Germany
  • 3Grenoble High Magnetic Field Laboratory, Max-Planck-Institut für Festkörperforschung, Centre Nationale de la Recherche Scientifique, 38042 Grenoble, France

  • *Present address: Institute of Micro- and Optoelectronics, Federal Institute of Technology, CH-1015 Lausanne, Switzerland.

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Vol. 73, Iss. 15 — 10 October 1994

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