Time-Resolved Resonant Tunneling between GaAs/Al0.35Ga0.65As Quantum Wells: A Coherent Process?

  • M. G. W. Alexander
  • W. W. Rühle
  • M. Nido
  • K. Köhler
Part of the NATO ASI Series book series (NSSB, volume 277)


Electron and hole tunneling transfer processes in asymmetric double quantum well structures are investigated by time-resolved picosecond photoluminescence. Change from nonresonant to resonant tunneling is achieved with a perpendicular electric field. Electron and hole transfer times become considerably faster in the resonant regime. The transfer times decrease strongly with the barrier thickness. We observe neither coherent oscillation nor LO phonon intersubband scattering times for electron tunneling. We discuss the importance of the homogeneous and inhomogeneous line broadening mechanisms for the question of coherent vs. incoherent tunneling.


Quantum Well Transfer Time Resonant Tunneling Barrier Thickness Tunneling Time 
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Copyright information

© Springer Science+Business Media New York 1991

Authors and Affiliations

  • M. G. W. Alexander
    • 1
  • W. W. Rühle
    • 1
  • M. Nido
    • 2
  • K. Köhler
    • 3
  1. 1.Max-Planck-Institut für FestkörperforschungStuttgart 80Germany
  2. 2.NEC CorporationOpto-Electronics Research LaboratoriesKawasaki, Kanagawa 213Japan
  3. 3.Fraunhofer-Institut für Angewandte FestkörperphysikFreiburgGermany

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