Comparison of the differential absorption obtained within a few-level model and the microscopic density-matrix theory

Authors
Reichelt, M Sieh, C Meier, T Koch, SW
Citation
M. Reichelt et al., Comparison of the differential absorption obtained within a few-level model and the microscopic density-matrix theory, PHYS ST S-B, 221(1), 2000, pp. 249-252
Citations number
16
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
221
Issue
1
Year of publication
2000
Pages
249 - 252
Database
ISI
SICI code
0370-1972(200009)221:1<249:COTDAO>2.0.ZU;2-G
Abstract
A phenomenological multi-exciton level scheme is used to calculate the exci tonic differential absorption as measured in pump and probe experiments. Nu merical results are compared to those obtained by a fully microscopic densi ty-matrix theory. For resonant excitation, optimized parameters yield quali tative agreement, but the phenomenological approach soon reaches its limit for non-resonant pumping.