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, and Steven T. Cundiff
Phys. Rev. Lett. 112, 046402 – Published 28 January 2014
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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.

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  • Received 15 July 2013

DOI:https://doi.org/10.1103/PhysRevLett.112.046402

© 2014 American Physical Society

Authors & Affiliations

Gaël Nardin1, Galan Moody1,2,†, Rohan Singh1,2, Travis M. Autry1,2, Hebin Li1,‡, François Morier-Genoud3, and Steven T. Cundiff1,2,*

  • 1JILA, University of Colorado and National Institute of Standards and Technology, Boulder, Colorado 80309-0440, USA
  • 2Department of Physics, University of Colorado, Boulder, Colorado 80309-0390, USA
  • 3Laboratory of Quantum Optoelectronics, École Polytechnique Fédérale de Lausanne (EPFL), CH-1015 Lausanne, Switzerland

  • *cundiff@jila.colorado.edu
  • National Institute of Standards & Technology, Boulder, CO 80305-3328, USA.
  • Department of Physics, Florida International University, Miami, FL 33199, USA.

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Issue

Vol. 112, Iss. 4 — 31 January 2014

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