Premium
Many‐Exciton Theory for Multiple Quantum‐Well Structures
Author(s) -
Manzke G.,
Henneberger K.,
May V.
Publication year - 1987
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2221390121
Subject(s) - exciton , excitation , excited state , electron , biexciton , quantum well , physics , condensed matter physics , wave function , quantum , semiconductor , nonlinear system , quantum mechanics , laser
The many‐exciton theory of highly excited semiconductors is reformulated in order to apply it to the case of a quasi two‐dimensional confinement of electrons and holes in a multiple quantum‐well structure. Using simple variational ansatzes for the exciton wave function in the low excitation limit density dependent exciton parameters are calculated for a GaAs‐GaAlAs multiple quantum‐well system. In contrast to bulk material but in agreement with experimental findings a blue shift of the excitonic resonance with increasing excitation intensity is obtained. The results are used to demonstrate nonlinear optical behaviour, especially bistabilities, for such systems.