
D. A. B. Miller, D. S. Chemla and S.
SchmittRink, "Relation Between Electroabsorption in Bulk Semiconductors and in
Quantum Wells: The QuantumConfined FranzKeldysh Effect," Phys. Rev. B33,
69766982 (1986). The authors evaluate the interband optical absorption of a
semiconductor quantum well in the presence of a uniform electric field perpendicular to
the layer and neglecting excitonic effects. They show that this formally becomes the
FranzKeldysh effect in the limit of an infinitely thick layer. When the potential drop
across the layer is small compared to the confinement energy the authors obtain behavior
qualitatively different from the bulk FranzKeldysh effect and they explain this in terms
of a quantumconfined FranzKeldysh effect; with increasing field they demonstrate
numerically for a GaAslike semiconductor that they recover FranzKeldyshlike behavior,
once the originally 'forbidden' quantumwell transitions become strong. The authors'
discussion gives an alternative physical picture for the FranzKeldysh effect, including a
simple explanation of the FranzKeldysh oscillations
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