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  • Nano Review
  • Open Access

Unbound states in quantum heterostructures

Nanoscale Research Letters20061:120

  • Published:


We report in this review on the electronic continuum states of semiconductor Quantum Wells and Quantum Dots and highlight the decisive part played by the virtual bound states in the optical properties of these structures. The two particles continuum states of Quantum Dots control the decoherence of the excited electron – hole states. The part played by Auger scattering in Quantum Dots is also discussed.


  • Virtual bound states
  • Quantum Dots
  • Quantum Wells
  • Decoherence
  • Auger effect
  • Photodetectors




The LPA-ENS is “Laboratoire associé au CNRS et aux Universités Pierre et Marie Curie et Denis Diderot”. One of us (GB) would like to thank Profs. H. Sakaki, Y. Arakawa and K. Hirakawa for their hospitality at the IIS-Tokyo where part of this review was written and for enlightening discussions. A number of colleagues have helped us to investigate more thoroughly the QD continuum. We acknowledge Profs. Y. Guldner, G. Strasser and K. Unterrainer, Drs. G. Cassabois, S. Hameau, N. Regnault, Ph. Roussignol and L.A. de Vaulchier for numerous insights on InAs QDs. We are much indebted to Drs. I. Favero, C. Kammerer, Ph. Lelong, A. Vasanelli, I. Magnusdottir, O. Verzelen, N. D. Phuong, R. Oulton and F. F. Schrey for their active participation to the work reported here.

Authors’ Affiliations

Laboratoire Pierre Aigrain, Ecole Normale Supérieure, 24 rue Lhomond, F-75005 Paris, France
Institute of Industrial Sciences, Tokyo University, 4-6-1 Komaba, Meguro-ku Tokyo, 153-8505, Japan


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