Microscopic theory for the valence intersubband absorption of quantum wells

M.F. Pereira^a and H. Wenzel^b

^a Tyndall National Insitute, Lee Maltings, Prospect Row, Cork, Ireland
^b Ferdinand-Braun-Institut für Höchstfrequenztechnik, Gustav-Kirchhoff-Straße 4, D-12489 Berlin, Germany

Published in:
Microelectronic Engineering 81 (2005) 510-513.
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Abstract:
In this paper we focus on the temperature dependence and on a detailed analysis of the interplay between Coulomb effects at Hartree-Fock level,namely:subband shifts,exchange and depolarization shifts to the valence intersubband absorption of III-V semiconductor quantum wells. We show how the tendency of the depolarization to create double peaks in the absorption spectra in the presence of a strongly k-space localized dipole moment can be partially compensated by the other Coulomb corrections considered.

Keywords:
Quantum cascade lasers; Many body effects; Intersubband transitions

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