Signatures of Two-Pair Correlations after Simultaneous Excitation of Excitons and Free Electron–Hole Pairs in a Quantum Wire

Title data

Wühr, J. ; Axt, Vollrath Martin ; Siantidis, K. ; Kuhn, Tilmann:
Signatures of Two-Pair Correlations after Simultaneous Excitation of Excitons and Free Electron–Hole Pairs in a Quantum Wire.
In: Physica Status Solidi A. Vol. 190 (2002) Issue 3 . - pp. 775-779.
ISSN 1521-396X
DOI: https://doi.org/10.1002/1521-396X(200204)190:3<775::AID-PSSA775>3.0.CO;2-W

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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. Calculations accounting non-perturbatively for the Coulomb interaction are compared with the Born approximation (BA) and mean-field (MF) results. Thereby signatures of two-pair correlations are identified as well as qualitative differences between microscopic scattering theories and phenomenological treatments of pair relaxations.