Interband optical absorption in the Wannier-Stark ladder under the electron-LO-phonon resonance condition

Interband optical absorption in the Wannier-Stark ladder in the presence of electron-LO-photon resonance is investigated theoretically. The electron-LO-phonon resonance occurs when the energy spacing between adjacent Stark-ladder levels coincides with the LO-phonon energy. We propose a model describ...

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Bibliographic Details
Published in:Solid state communications 1994-12, Vol.92 (12), p.977-982
Main Author: Govorov, A.O.
Format: Article
Language:English
Subjects:
A: quantum wells
D: electron-phonon interaction
E: light absorption
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Summary:Interband optical absorption in the Wannier-Stark ladder in the presence of electron-LO-photon resonance is investigated theoretically. The electron-LO-phonon resonance occurs when the energy spacing between adjacent Stark-ladder levels coincides with the LO-phonon energy. We propose a model describing the polaron effect in a superlattice. Calculations show that the absorption line shape is strongly modified due to the polaron effect under the electron-LO-phonon resonance condition. We consider optical phenomena in a normal magnetic field that leads to enhancement of polaron effects.
ISSN:0038-1098
1879-2766
DOI:10.1016/0038-1098(94)90024-8