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Spectroscopy of Quantum-Dot Atoms

  • Detlef Heitmann
  • B. Meurer
  • T. Demel
  • P. Grambow
  • K. Ploog
Part of the NATO ASI Series book series (NSSB, volume 288)

Abstract

Quantum dots are artifical ‘atoms’, systems where electrons are confined on a very small scale in all three directions in space thus that they exhibit an energy spectrum consisting only of discrete levels. They are advanteously prepared by lateral microstructuring of epitaxial grown semiconductor heterostructures and quantum well systems. With the progress in the preparation techniques one is now approaching the limit to prepare quantum dots with well defined small numbers of electrons per dot, N= 1,2,3,.. It becomes thus possible to perform a kind of ‘atomic’ spectroscopy in these systems. With typical confinement energies in the meV regime far-infrared spectroscopy gives a most direct access to the quantum confined energy levels in the quantum dots. We will show in this review that the dynamic excitations in these systems exhibit a very interesting complex interplay of atom-like single-particle and many-body effects.

Keywords

Gate Voltage Coulomb Energy Confinement Energy Dipole Excitation Confinement Length 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1992

Authors and Affiliations

  • Detlef Heitmann
    • 1
  • B. Meurer
    • 1
  • T. Demel
    • 1
  • P. Grambow
    • 1
  • K. Ploog
    • 1
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 80West-Germany

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