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arXiv:1308.1689 · Physical Review Letters

Coherent Excitonic Coupling in an Asymmetric Double InGaAs Quantum Well Arises from Many-Body Effects

Gaël Nardin, Galan Moody, Rohan Singh, Travis M. Autry, Hebin Li, François Morier-Genoud, Steven T. Cundiff

Published Jan 28, 2014• 72 citations
arXivHTMLPDF

Abstract

We study an asymmetric double InGaAs quantum well using optical two-dimensional coherent spectroscopy. The collection of zero-quantum, one-quantum, and two-quantum two-dimensional spectra provides a unique and comprehensive picture of the double well coherent optical response. Coherent and incoherent contributions to the coupling between the two quantum well excitons are clearly separated. An excellent agreement with density matrix calculations reveals that coherent interwell coupling originates from many-body interactions.

DOI
10.1103/physrevlett.112.046402

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