Nonlinear optical spectroscopy of indirect excitons in coupled quantum wells

P. Andreakou, S. Cronenberger, D. Scalbert, A. Nalitov, N. A. Gippius, A. V. Kavokin, M. Nawrocki, J. R. Leonard, L. V. Butov, K. L. Campman, A. C. Gossard, and M. Vladimirova
Phys. Rev. B 91, 125437 – Published 30 March 2015
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  • INTRODUCTION
  • SAMPLE AND EXPERIMENTAL SETUP
  • PHOTOINDUCED REFLECTIVITY
  • PHOTOINDUCED KERR ROTATION
  • ORIGIN OF THE PUMP-PROBE SIGNAL
  • CONCLUSION
  • ACKNOWLEDGMENTS
  • APPENDICES
    • References

    Abstract

    Indirect excitons in coupled quantum wells are long-living quasiparticles, explored in the studies of collective quantum states. We demonstrate that, despite the extremely low oscillator strength, their spin and population dynamics can by addressed by time-resolved pump-probe spectroscopy. Our experiments make it possible to unravel and compare spin dynamics of direct excitons, indirect excitons, and residual free electrons in coupled quantum wells. Measured spin relaxation time of indirect excitons exceeds not only one of direct excitons but also one of free electrons by two orders of magnitude.

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    • Received 3 October 2014
    • Revised 18 February 2015

    DOI:https://doi.org/10.1103/PhysRevB.91.125437

    ©2015 American Physical Society

    Authors & Affiliations

    P. Andreakou1, S. Cronenberger1, D. Scalbert1, A. Nalitov2, N. A. Gippius2,3, A. V. Kavokin4,5,6, M. Nawrocki7, J. R. Leonard8, L. V. Butov8, K. L. Campman9, A. C. Gossard9, and M. Vladimirova1

    • 1Laboratoire Charles Coulomb, UMR 5221 CNRS/ Université de Montpellier, F-34095 Montpellier, France
    • 2Institut Pascal, PHOTON-N2, Université Blaise Pascal, CNRS, 24 avenue des Landais, 63177 Aubière Cedex, France
    • 3Skolkovo Institute of Science and Technology, Skolkovo, Moscow Region 143025, Russia
    • 4Russian Quantum Center, 100, Novaya, Skolkovo, Moscow Region 143025, Russia
    • 5School of Physics and Astronomy, University of Southampton, Southampton SO17 1BJ, United Kingdom
    • 6Spin Optics Laboratory, St. Petersburg State University, 1, Ulianovskaya, St. Peterbsurg 198504, Russia
    • 7Institute of Experimental Physics, University of Warsaw, Hoża 69, 00-681 Warsaw, Poland
    • 8Department of Physics, University of California at San Diego, La Jolla, California 92093-0319, USA
    • 9Materials Department, University of California at Santa Barbara, Santa Barbara, California 93106-5050, USA

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    Issue

    Vol. 91, Iss. 12 — 15 March 2015

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