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Optical properties of a tip-induced quantum dot

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Abstract.

We have performed optical spectroscopy measurements on a STM-tip-induced quantum dot in a GaAs layer. The dominant confinement in the (hole) quantum dot is found to be in the direction parallel to the tip axis. Electron confinement is achieved by a sub-surface AlGaAs barrier. Current-dependent measurements indicate that many-body interactions can cause spectral blueshifts up to 75 meV for a tunneling current of 10 nA. Consequently, a full treatment of the many-body problem is required for an accurate description of this type of system.

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Authors and Affiliations

  1. COBRA Inter-University Research Institute, Eindhoven University of Technology, P.O. Box 513, 5600 MB Eindhoven, The Netherlands, , , , , , NL

    M. Kemerink, P.M. Koenraad, V.M. Fomin, J.H. Wolter & J.T. Devreese

  2. 4. Physikalisches Institut, Universität Göttingen, Bunsenstrasse 13, 37073 Göttingen, Germany, , , , , , DE

    K. Sauthoff

  3. Research Institute for Materials, University of Nijmegen, Toernooiveld, 6525 ED Nijmegen, The Netherlands, , , , , , NL

    J.W. Gerritsen & H. van Kempen

Authors
  1. M. Kemerink
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  2. K. Sauthoff
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  3. P.M. Koenraad
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  4. J.W. Gerritsen
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  5. H. van Kempen
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  6. V.M. Fomin
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  7. J.H. Wolter
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  8. J.T. Devreese
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Additional information

Received: 19 July 2000 / Accepted: 14 December 2000 / Published online: 11 April 2001

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Kemerink, M., Sauthoff, K., Koenraad, P. et al. Optical properties of a tip-induced quantum dot . Appl Phys A 72 (Suppl 2), S239–S242 (2001). https://doi.org/10.1007/s003390100668

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  • DOI: https://doi.org/10.1007/s003390100668

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