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Comparison of the Differential Absorption Obtained within a Few-Level Model and the Microscopic Density-Matrix Theory

✍ Scribed by M. Reichelt; C. Sieh; T. Meier; S.W. Koch

Publisher: John Wiley and Sons
Year: 2000
Tongue: English
Weight: 75 KB
Volume: 221
Category: Article
ISSN: 0370-1972
DOI: 10.1002/1521-3951(200009)221:1<249::aid-pssb249>3.0.co;2-e

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✦ Synopsis

A phenomenological multi-exciton level scheme is used to calculate the excitonic differential absorption as measured in pump and probe experiments. Numerical results are compared to those obtained by a fully microscopic density-matrix theory. For resonant excitation, optimized parameters yield qualitative agreement, but the phenomenological approach soon reaches its limit for non-resonant pumping.