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Identification of Higher-Order Electronic Coherences in Semiconductors by their Signature in Four-Wave-Mixing Signals

Title data

Bartels, G. ; Stahl, Arne ; Axt, Vollrath M. ; Haase, B. ; Neukirch, U. ; Gutowski, J.:
Identification of Higher-Order Electronic Coherences in Semiconductors by their Signature in Four-Wave-Mixing Signals.
In: Physical Review Letters. Vol. 81 (1998) Issue 26 . - pp. 5880-5883.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.81.5880

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

Four-wave-mixing signals from excitons under linear-circular polarized excitation exhibit an elliptical polarization, depending on both the pulse delay and the spectral position. Besides the resonances corresponding to excitons and exciton-biexciton transitions, a breakup of the exciton line is found reflecting the influence of correlations on the four-point level. An analysis accounting for the exciton density, the bound biexciton, and the exciton-exciton scattering continuum reveals that these features are not due to an antibound two-exciton state. Instead, they result from an interference of the correlated exciton continuum with the exciton density. In addition, the modeling shows that the signals ellipticity is highly sensitive to the influences of different correlations and, therefore, allows for a discrimination of their contributions.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: excitons; dynamics controlled truncation; Semiconductors; laser excitation; ultrafast dynamics; non-linear optics; biexcitons; four-wave mixing; exciton-exciton continuum
Institutions of the University: Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III > Chair Theoretical Physics III - Univ.-Prof. Dr. Martin Axt
Faculties
Faculties > Faculty of Mathematics, Physics und Computer Science
Faculties > Faculty of Mathematics, Physics und Computer Science > Department of Physics > Chair Theoretical Physics III
Result of work at the UBT: No
DDC Subjects: 500 Science > 530 Physics
Date Deposited: 17 Oct 2017 08:31
Last Modified: 17 Oct 2017 08:31
URI: https://eref.uni-bayreuth.de/id/eprint/40027