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Estimating the Memory Time Induced by Exciton-Exciton Scattering

Title data

Axt, Vollrath M. ; Kuhn, Tilmann ; Haase, B. ; Neukirch, U. ; Gutowski, Jürgen:
Estimating the Memory Time Induced by Exciton-Exciton Scattering.
In: Physical Review Letters. Vol. 93 (2004) Issue 12 . - No. 127402, 4 Seiten.
ISSN 1079-7114
DOI: https://doi.org/10.1103/PhysRevLett.93.127402

Project information

Project financing: Deutsche Forschungsgemeinschaft

Abstract in another language

It is shown that lower bounds for the effective memory time induced by two-pair correlations can be estimated by monitoring changes of the shape of excitonic four-wave-mixing spectra. Experimentally we demonstrate a memory time of at least 540 fs for a ZnSe single quantum well. Microscopic calculations reveal that this lower bound is not sharp. Interactions retarded by more than 800 fs are shown to influence the dynamics, reflecting the presence of a long time tail in the memory kernel.

Further data

Item Type: Article in a journal
Refereed: Yes
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: 23 Oct 2017 10:19
Last Modified: 23 Oct 2017 10:19
URI: https://eref.uni-bayreuth.de/id/eprint/40112