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Influence of Two-Pair Continuum Correlations Following Resonant Excitation of Excitons

Title data

Axt, Vollrath M. ; Haase, B. ; Neukirch, U.:
Influence of Two-Pair Continuum Correlations Following Resonant Excitation of Excitons.
In: Physical Review Letters. Vol. 86 (May 2001) Issue 20 . - pp. 4620-4623.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.86.4620

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

The memory structure induced by coherent transitions to the exciton-exciton scattering continuum is shown to have significant influence on spectrally resolved four-wave-mixing signals even under selective excitation of 1s excitons. Comparisons between experiments and calculations that account nonperturbatively for these quantum kinetic Coulomb correlations demonstrate large compensations between mean-field contributions and transitions to the two-pair continuum. Experiments with different polarizations of the laser pulses show that two-pair continuum correlations are responsible for delay-time dependent shifts of the excitonic emission as well as for substantial deformations of the line shape.

Further data

Item Type: Article in a journal
Refereed: Yes
Additional notes: Condensed matter physics (theoretical and experimental)
Keywords: quantum wells; excitons; multiwave mixing; optical correlation; 2-particle level; 4-particle correlations; detailed microscopic theory; dynamics controlled truncation; four-wave mixing; higher order exciton correlations; nonlinear optical response; semiconductors; two-pair continuum correlations; non-linear optics; ultrafast dynamics; memory effects; exciton-exciton memory
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 15:11
Last Modified: 17 Oct 2017 15:11
URI: https://eref.uni-bayreuth.de/id/eprint/40055