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arXiv:0906.4068 · Physical Review Letters

Two-Quantum Many-Body Coherences in Two-Dimensional Fourier-Transform Spectra of Exciton Resonances in Semiconductor Quantum Wells

D. Karaiskaj, Alan D. Bristow, Lijun Yang, Xingcan Dai, Richard P. Mirin, Shaul Mukamel, Steven T. Cundiff

Published Mar 15, 2010• 144 citations
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Abstract

We present experimental coherent two-dimensional Fourier-transform spectra of Wannier exciton resonances in semiconductor quantum wells generated by a pulse sequence that isolates two-quantum coherences. By measuring the real part of the signals, we determine that the spectra are dominated by two-quantum coherences due to mean-field many-body interactions, rather than bound biexcitons. Simulations performed using dynamics controlled truncation agree with the experiments.

DOI
10.1103/physrevlett.104.117401

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