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Dynamics of two-pair correlations induced by simultaneous excitation of excitonic and band-to-band continuum transitions

Title data

Wühr, J. ; Axt, Vollrath M. ; Kuhn, Tilmann:
Dynamics of two-pair correlations induced by simultaneous excitation of excitonic and band-to-band continuum transitions.
In: Physica Status Solidi B. Vol. 238 (2003) Issue 3 . - pp. 556-560.
ISSN 0370-1972
DOI: https://doi.org/10.1002/pssb.200303189

Abstract in another language

The impact of all kinds of two-pair correlations (biexcitons, exciton–exciton scattering states, two free electron–hole pairs) on four-wave-mixing (FWM) signals generated by ultra-short optical pulses that simultaneously excite excitons and free electron–hole pairs is analyzed. Signatures of two-pair correlations are identified by comparing the full theory with mean-field (MF) results. For systems with strong exciton binding two-pair correlations suppress changes of the line width of the excitonic emission that are predicted by the MF theory when the central excitation energy is varied above the band edge. For systems with weakly bound excitons the presence of two-pair correlations leads to an emission in between the exciton and the band edge with a complex line shape which strongly depends on the excitation energy.

Further data

Item Type: Article in a journal
Refereed: Yes
Keywords: two-pair correlations; exciton-exciton continuum correaltions; biexcitons; dynamics controlled trauncation; non-linear optics; ultrafast dynamics; free electron hole pairs; four-wave mixing
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 08:21
Last Modified: 23 Oct 2017 08:21
URI: https://eref.uni-bayreuth.de/id/eprint/40102