Physics – Condensed Matter – Mesoscale and Nanoscale Physics
Scientific paper
2010-10-01
J. Phys. Chem. B, 115 (2011), pp. 5372--5382; Special Issue: Shaul Mukamel Festschrift
Physics
Condensed Matter
Mesoscale and Nanoscale Physics
11 pages, 5 figures
Scientific paper
10.1021/jp109453y
Using previously developed exciton scattering model accounting for the interband, i.e., exciton-biexciton, Coulomb interactions in semiconductor nanocrystals (NCs), we derive a closed set of equations for 2D double-quantum coherence signal. The signal depends on the Liouville space pathways which include both the interband scattering processes and the inter- and intraband optical transitions. These processes correspond to the formation of different cross-peaks in the 2D spectra. We further report on our numerical calculations of the 2D signal using reduced level scheme parameterized for PbSe NCs. Two different NC excitation regimes considered and unique spectroscopic features associated with the interband Coulomb interactions are identified.
Piryatinski Andrei
Velizhanin Kirill A.
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