Book chapter
Coherent dynamics in semiconductors
Ultrafast nonlinear optical spectroscopy is used to study the coherent dynamics of optically excited electron-hole pairs in semiconductors. Coulomb interaction implies that the optical inter-band transitions are dominated, at least at low temperatures, by excitonic effects. They are further enhanced in quantum confined lower-dimensional systems, where exciton and biexciton effects dominate the spectra even at room temperature.
The coherent dynamics of excitons are at modest densities well described by the optical Bloch equations and a number of the dynamical effects known from atomic and molecular systems are found and studied in the exciton-biexciton system of semiconductors. At densities where strong exciton interactions, or many-body effects, become dominant, the semiconductor Bloch equations present a more rigorous treatment of the phenomena Ultrafast degenerate four-wave mixing is used as a tool to study the coherent exciton dynamics, and the importance of performing transform limited spectroscopy is demonstrated throughout.
Language: | English |
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Publisher: | Springer US |
Year: | 1998 |
Pages: | 357-379 |
Series: | N a T O Advanced Science Institutes Series B: Physics |
ISBN: | 0306459299 , 0306470802 , 1280206519 , 9780306459290 , 9780306470806 and 9781280206511 |
ISSN: | 02581221 |
Types: | Book chapter |
DOI: | 10.1007/0-306-47080-2_10 |
ORCIDs: | Hvam, Jørn Märcher |