We present a collection of zero-, one- and two-quantum two-dimensional coherent spectra of excitons and trions in a CdTe/(Cd,Mg)Te quantum well. The set of spectra provides a unique and comprehensive picture of the exciton and trion nonlinear optical response. Exciton-exciton and exciton-trion coherent coupling is manifest as distinct peaks in the spectra, whereas signatures of trion-trion interactions are absent. Excellent agreement using density matrix calculations is obtained, which highlights the essential role of many-body effects on coherent interactions in the quantum well.
@article{arxiv.1308.2165,
title = {Exciton-Trion Coherent Interactions in a CdTe/CdMgTe Quantum Well},
author = {G. Moody and I. A. Akimov and H. Li and R. Singh and D. R. Yakovlev and G. Karczewski and M. Wiater and T. Wojtowicz and M. Bayer and S. T. Cundiff},
journal= {arXiv preprint arXiv:1308.2165},
year = {2014}
}